Russia will have "the cleanest team" at Rio 2016 after 271 athletes were cleared to compete, their Olympic president says, and more could follow.Read more
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We're all excited, but it's going to be a long two weeks, so it's important we get some sleep in tonight while we can.
If that isn't an option, there's plenty of sport to keep you going, with West Ham playing for the first time in the Olympic Stadium, and Brazil's men kicking off their Olympic football campaign.
Thanks for reading and see you again tomorrow!
Slovenian minnows NK Domzale will be be out to ruin West Ham's first game at the Olympic Stadium tonight when they meet in the second leg of their Europa League qualifying third-round tie at 19:45 BST.
Luka Elsner's side "made history" in the first leg with a shock 2-1 win against the Hammers, the biggest result in the club's 95-year existence.
This is a club that cannot afford to pay transfer fees, that is forced to sell its best players every couple of years, with a team ethic inspired by the Hollywood film 300 and a young manager in the mould of Diego Simeone.
Before tonight's match, Elsner told BBC Sport about his coaching philosophy, the club's novel approach to transfers and his Domzale "army".
BBC Sport in Rio
The four-hour time difference is hammering some here in Rio.
A boxing draw which ends near 2pm gives reporters a matter of minutes to meet the 6pm deadlines for TV around the UK. One reporter just needed his wi-fi to fire so badly that after some advice he ran to the roof to file a TV package.
The draw doesn't look too bad for GB's hopes. A bye for Nicola Adams, Joe Joyce and Muhammad Ali. Anthony Fowler at middleweight faces a seeded opponent, that's a bit nasty.
In all GB has 12 medal chances and remember they won five at London 2012. Beating that looks tough but team boss Rob McCracken thinks this squad has more to offer than that of four years ago.
Let's not forget, the 12 fighters were not chosen, they had to qualify. A country can only qualify one fighter in each weight class and GB has 12 in the 13 classes. That shows real depth.
BBC Sport Wales
Swansea City have agreed a fee and personal terms in their bid to sign Sevilla striker Fernando Llorente.
The 31-year-old Spanish international has two years left on his contract with the La Liga side and will have a medical with the Welsh club on Friday.
"It has come a long way with Swansea to reach an agreement," said Sevilla sporting director Monchi.
Swansea chairman Huw Jenkins expects to announce at least one new signing in the "next few days".
So many global golds has Mo Farah now won over the past five years that he arrives in Rio chasing an unprecedented quadruple-double - a fourth successive triumph at a major international games over both 5,000m and 10,000m.
Having pulled that off in spectacular fashion in London, he repeated the trick at the Worlds in both Moscow and Beijing, running each time with pretty much identical tactics.
No Briton has ever won three Olympic gold medals in athletics. Farah, time after time, has proved himself equal to the challenge.
Read more here.
England have been made to toil by Pakistan on day two of the third Test at Edgbaston, with the visitors closing on 257-3, and Azhar Ali the latest Pakistani to pull out the push-up celebration after making 139 - before being dismissed by Chris Woakes with the last ball of the day.
Follow all of the reaction over on our live page.
It has been the transfer saga of the summer - even the impending Olympics can't stop it from getting a mention in Sportsday - but Manchester United's pursuit of Paul Pogba could finally have ended in success.
The Manchester Evening News are reporting that the deal to bring the 23-year-old France midfielder to the club from Juventus for a world record fee is complete, and will be announced as soon as Pogba ends his holiday in the USA.
The 100m is arguably the Olympic Games' most iconic event.
A gold medal in the race gives an athlete global recognition. Breaking the world record over the distance ensures sporting immortality.
American Donald Lippincott and Czech Marie Mejzlikova were the first, with Jamaica's Usain Bolt and Florence Griffith-Joyner of the United States the current holders of the crown.
Before the 2016 Games in Rio, at which Bolt and compatriot Shelly-Ann Fraser-Pryce will defend the 100m titles they won in London four years ago, BBC Sport presents a chronological history of world records in the event, showing each time it has been broken and when.
Take a look here.
The first woman in Olympic history to win a boxing gold medal, Nicola Adams is now looking to become the first Briton since Harry Mallin in 1924 to retain an Olympic title in the ring.
The 33-year-old is in form - she became world champion in May - and while the woman she beat in the flyweight final in London, China's Ren Cancan, is back again for revenge, Adams believes she is in better shape than four summers ago.
Read more here.
Ex-Manchester United defender Nemanja Vidic has revealed the three strikers he struggled against most during his playing career, in an interview with FourFourTwo.
And followers of the Serbian centre-half's career may be surprised that he left out Fernando Torres - with whom he had struggles more than once - plumping instead for Didier Drogba (above), Luis Suarez and Sergio Aguero.
"Torres always created a chance to score, but Drogba was on you for the full game," he said.
“Drogba was physically the hardest, Suarez and Aguero were the best."
Great Britain's Jo Pavey will make history this summer when she runs in the 10,000m at Rio 2016. She will be the oldest female track runner to compete at an Olympics at the age of 42. It will be her fifth Games.
“I never thought I’d be here at this stage," she told BBC Sport.
"I remember when it was announced in 2005 that London would host 2012, thinking ‘oh, what a shame, I would have loved to compete in a home Games but I’ll probably be retired'. I would never have thought about competing in the one after that.
“I’ve really found motivation from juggling everything, my little boy is a great training partner of mine, he’ll go about eight or nine miles along the canal path with me on his bike."
Does a good luck message from a member of the Royal Family count double?
Arsenal are interested in signing the Valencia and Germany defender Shkodran Mustafi.
The Gunners have yet to submit a bid to the Spanish club, but are targeting Mustafi as they look to reinforce a defence depleted by the loss of Per Mertesacker to injury.
They face competition for the 24-year-old former Everton and Sampdoria player from a number of clubs including AC Milan and Chelsea, whose manager Antonio Conte knows Mustafi well.
Meanwhile, Arsenal also want to sign a striker before the end of the transfer window, but they are not pursuing forwards Riyad Mahrez of Leciester City or Julian Draxler of Wolfsburg.
He is the reigning world, European and Commonwealth champion, and the current world record holder at 100m breaststroke.
These might be 21-year-old Adam Peaty's first Olympic Games, but the kid from Uttoxeter who grew up scared of water has appeared intimidated by little else since his big breakthrough two years ago.
It makes sense: this is a man who relaxes by listening to NWA and practising target shooting with an air rifle.
Read more here.
Former Arsenal and Reading goalkeeper Graham Stack has joined Sachin Tendulkar's Indian Super League side Kerala Blasters.
The 34-year-old, who left Barnet last week after four seasons with the club, will link up with his former Reading manager Steve Coppell at the Blasters. He will also take on the role of goalkeeping coach.
Stack spoke to former Gunners team-mate Robert Pires, who played for FC Goa in 2014, before moving.
"He loved it over there," Stack told BBC Sport. "He said it’s wonderful, the people, the places.
"For someone like Robert, who has achieved a hell of a lot in the game, to have that opinion of the country and the league, that tells me something is going on, and it’s good. I like the sound of it.”
Joanna Rowsell Shand, who's competing in the women's team pursuit, has arrived in Rio.
I wonder if anyone's ever attempted to give the sport a miss and just enjoy the surroundings...
BBC Sport in Rio
To the gymnastics arena we go, second venue of the day. Gymnasts are practising, broadcasters are rehearsing. It all looks good to go.
A little tip from BBC Sport's gymnastics expert Craig Heap - take a jumper if heading to the gymnastics arena as it gets a little chilly in there.
Brazil's men will take to the football field at 20:00 BST tonight, after the female host team won 3-0 yesterday to kick off their tournament.
Before that though we have Denmark v Iraq - which you can watch live here - and Honduras v Algeria.
Imagine the honour. You've been chosen, from a field of reigning champions, world record holders and knights of the realm to hold the flag for your Olympic delegation.
That man will be Wimbledon champion Andy Murray, but how will the Scot remember the proud moment he found out?
Find out below...
Great Britain bagged 64 medals at their home Olympics last time out, and although expectations have been tempered now they've moved out of the comfort of London - with 46 the new target - we've highlighted some of the team's strongest gold medal prospects.
We'll be picking out a few for you here over the next couple of hours, but if you want to take in all our punts in one sitting, click here.
BBC Radio 5 Live
TV sport presenter Charlie Webster has cycled 3,000 miles from London's Olympic Stadium to Rio to raise funds for the Jane Tomlinson Foundation.
On arrival in Rio, she told 5 live Daily: "I feel so overwhelmed and relieved and I’ve got goosebumps.”
Charlie cycled alongside Jane's widower Mike, whose wife died in 2007 after battling breast cancer.
They were also joined by ex-rugby league professionals Keith Senior and Paul Highton.
BBC Sport in Rio
Great Britain sailor Hannah Mills says it would be "disastrous" if the rubbish in Rio's Guanabara Bay affected the team's medal chances.
Mills, who, alongside Saskia Clark, is aiming to improve on their silver medal at London 2012 in the 470 class, says that rubbish can get caught on a boat's fins, sometimes halving their speed.
But she acknowledged that authorities had made in improvements in cleaning up the Bay.
"Picking up a bag at the wrong time could be disastrous," she told BBC Sport. "If that happens at the start line you can slow to half-speed and everyone will sail past you.
"Having said that, it is very rare. We've been caught once in 150 days and we really hope it doesn't affect anyone and it's just clean sailing out there."
Nigeria are due to arrive for their men's football game against Japan at Rio 2016 six hours before kick-off - after stepping off a seven-hour flight.
The 1996 champions were already pushing it for time with their flight from the United States because of a problem with payment. When the plane arrived, the players thought it was too small, so a bigger one was needed.
"The players were uncomfortable with the size of the plane," team media officer Timi Ebikagboro told BBC Sport.
The game kicks of at 02:00 BST tonight/tomorrow morning. They're in the air now.
Andy Murray's opponent in his opening match at Rio 2016 is Serbia's Victor Troicki.
Remember him? He was the guy fined for unsportsmanlike conduct after a rant at an umpire following his second-round defeat at this year's Wimbledon.
It's clear that the GB sailing team still have concerns about the water quality in Guanabara Bay, most importantly surrounding rubbish, which is still being pulled out of the water with competition due to begin in Saturday.
Team leader Stephen Park says: "It goes without saying that the water quality has been a challenge. It's been great to see that the water has improved and the amount of effort that has been going in both locally and politically and there is still a long way to go.
"But I don't think we can underestimate the size of the challenge they are facing. Hopefully over the next few days we will see it continue to improve and there are one or two individuals doing great work clearing up rubbish particularly around the tidelines."
BBC Sport in Rio
Possibly the most bizarre draw you can witness.
The big screen displays an automated draw where flags fly into the draw tree but no one can see the text as the font is minuscule.
People have given up on it and have just started chatting among themselves. All will have to wait for printouts some time from now. It'll be a scrum to get one.
Early guesswork - and this is with a lot of squinting - is that Team GB has some difficult draws. Nicola Adams we know has a bye though.
BBC tennis correspondent
At 35 in the world, and in a best-of-three set match, Viktor Troicki is a dangerous first round opponent - even though Andy Murray has won all seven of their previous meetings.
His chief rival Novak Djokovic has an even more perilous start against the former US Open champion Juan Martin del Potro and could face Jo-Wilfried Tsonga in the quarter-finals. Murray's projected opponent in the last eight is David Ferrer; and in the semi-final Kei Nishikori.
The draw has been kind to Konta, Watson and Edmund, although Watson's opponent Peng Shuai was 27 in the world before missing 10 months through injury.
GB windsurfer Nick Dempsey, who won a silver medal at London 2012, has said if a plastic bag catches on his fin while sailing in Guanabara Bay then it could cost him a medal.
Fellow windsurfer Bryony Shaw, who won a bronze in the 2008 Olympics, told BBC Sport: "The water quality is an issue and you do pick up rubbish on your fins. Nobody wants medals taken away for that reason.
"But in the last couple of weeks the bay is cleaning up. Even when you pass the tideline there is way less rubbish to weave your way through.
"On a windsurfer we're we are going pretty fast, rubbish can stop you in your tracks and nobody wants that in the races."
International Olympic Committee today announced that leading Indian philanthropist and the Founder chairperson of the Reliance Foundation, Nita Ambani, has been elected as an individual member of the IOC, and will become India’s first woman to join the prestigious body.
Nita Ambani is the only individual member from India and her appointment at the world body is until she attains the age of 70.
Manny Pacquiao will return to the ring on 5 November against American WBO welterweight champion Jessie Vargas.
Former eight-division world champion Pacquiao, 37, had announced his retirement after beating Timothy Bradley in April.
But his promoter Bob Arum said last month that the Filipino boxer would fight again this year.
"Retirement doesn't suit Manny right now," Pacquiao's manager Michael Koncz told the Los Angeles Times.
Weird. I reckon retirement with loads of money would suit me just fine...
BBC Sport, Olympic Sport reporter
Security has certainly stepped up significantly around the outside of the Rio Olympic Park today!
Heavily armed guards and military vehicles line the perimeter of the Park. Not aware of any increased security threat, but obviously the number of tourists, team coaches, officials and media has risen dramatically as we near tomorrow's opening ceremony.
All 11 Russian boxers and one golfer who qualified for the Rio Olympics have been cleared to play at the Games.
A three-member International Olympic Committee (IOC) panel ratified the decision of the International Boxing Association to allow them to compete.
The Russian weightlifting team and 17 rowers failed in appeals against bans.
Eight tennis players, 11 judoka and two swimmers have been cleared by their federations and their cases will now be heard by the three-member IOC panel.
BBC tennis correspondent
Defending champion Andy Murray will play Serbia's Viktor Troicki in the opening round of the Olympic singles.
Top seed Novak Djokovic has been drawn against 2009 US Open champion Juan Martin del Potro in the very first round.
Kyle Edmund takes on Jordan Thompson of Australia.
In the women's singles, 10th seed Johanna Konta plays Stephanie Vogt of Liechtenstein, while Heather Watson also faces a player outside the top 250 in Peng Shuai of China.
Jamie and Andy Murray v Andre Sa and Thomaz Bellucci (BRA)
Colin Fleming and Dom Inglot v Santiago Gonzalez and Miguel-Angel Reyes-Varela (MEX)
Johanna Konta and Heather Watson v Jelena Jankovic and Aleksandra Krunic (SRB)
BBC Sport in Rio
Nicola Adams has a bye in round one of her flyweight category.
The remaining 11 GB boxers are yet to be drawn. There's some head scratching as it's an automated computer generated draw and the font on the big screen is tiny. Most people in the theatre are squinting and confused.
Manchester City Women's game against Doncaster Rovers Belles in the FA WSL quarter-final on Sunday, 7 August (14:00 BST) will be streamed through Facebook Live.
City say they will be the first women’s football club in UK to use the website to stream a competitive fixture.
Last night, Wayne Rooney's testimonial was shown live on the social media network.