For a list of confirmed transfers, check out the transfers page.
Visit our manager ins and outs page for a list of all the current bosses in the top five leagues in England and the Scottish Premiership.
Atletico Madrid manager Diego Simeone says Chelsea striker Fernando Torres would love to return to the Spanish club. The Argentine also insists he will support 25-year-old striker Diego Costa, who has been linked to the Blues, in any decision he makes over his future.
Arsenal have admitted defeat to Chelsea in the race to sign Costa and will now move for Bayern Munich forward Mario Mandzukic, 27, instead.
Everton boss Roberto Martinez has laughed off reports linking midfielder Ross Barkley with a £38m move to Merseyside rivals Liverpool.
Manchester City pay their players more than any other sports team in the world, with their stars picking up an average weekly wage of £102,653.
Manchester United have targeted a £12.5m move for Barcelona midfielder Alex Song but face competition from Liverpool, AC Milan and Atletico Madrid for the former Arsenal player's signature.
Scottish club Celtic are set to beat Premier League sides Hull, West Brom and Swansea, as well as Championship outfit Burnley, to the signing of Osasuna midfielder Raoul Loe, 25.
Inter Milan general director Marco Fassone has hinted the Italian club may make a bid for Chelsea striker Fernando Torres, 30.
Chelsea have joined Arsenal in the race to sign Everton's 19-year-old defender John Stones.
Arsenal have made enquiries about Real Madrid's 22-year-old Brazilian midfielder Casemiro and are also interested in the Spanish club's 21-year-old striker Alvaro Morata.
West Ham midfielder Mohamed Diame, 26, says he is on Liverpool's list of transfer targets.
Manchester United defender Rio Ferdinand's contract is up at the end of the season and the 35-year-old says he wants to continue playing, ideally at the Old Trafford club.
Southampton and Sevilla have joined Everton in the competition to sign 30-year-old Espanyol striker Sergio Garcia.
Chelsea keeper Petr Cech has questioned whether Liverpool have the nerve to win the Premier League title.
Manchester City are facing a heavy fine or a transfer embargo from Uefa for breaching Financial Fair Play regulations.
Swansea's players were involved in heated training ground clashes ahead of the relegation-battling club's defeat by Chelsea last Sunday.
Borussia Dortmund coach Jurgen Klopp is Manchester United's number one choice to replace David Moyes if they decide to end the Scot's time at the club.
But Klopp is top of Tottenham list to replace Tim Sherwood as the White Hart Lane club's manager.
Manchester United trio Danny Welbeck, Tom Cleverley and Ashley Young have been fined and warned about their future conduct after a night out in the wake of the club's Champions League quarter-final exit to Bayern Munich.
Liverpool full-back Jon Flanagan, 21, says winning the Premier League title for inspirational captain Steven Gerrard is a big motivation for the squad.
GLOBAL GOSSIP (sourced by BBC Monitoring)
Barcelona have denied making any contact with Jurgen Klopp after Spanish media reported that the Catalan giants were preparing a summer move for the Borussia Dortmund manager to replace Tata Martino.
Chelsea are ready with a £13m bid for 20-year-old Hamburg midfielder Hakan Calhanoglu, who is a target for Atletico Madrid target.
Paris St-Germain have joined Manchester United and Barcelona in the pursuit of Borussia Dortmund midfielder Marco Reus, 24. Besides Reus, Schalke's Julian Draxler, 20, is also on the wish list of French side PSG.
Borussia Dortmund have bought back 25-year-old Germany-born Turkey midfielder Nuri Sahin from Real Madrid for £5m.
Germany and Real Madrid midfielder Sami Khedira, 27, has resumed training with the team after being sidelined for six months with a knee injury.
Manchester United have already made contact with Dutchman Louis van Gaal to replace manager David Moyes during the summer.
Juventus midfielder Andrea Pirlo, 34, says former Manchester United manager Sir Alex Ferguson ruined his "purity" when he got Park Ji-Sung to man-mark him during a game between his former club AC Milan and the Old Trafford outfit.
You can comment on the latest gossip on the BBC Sport Facebook page.