UK Championship: Mark Selby knocked out by Scott Donaldson in second round
Defending champion Mark Selby was knocked out of the UK Championship following a shock 6-3 defeat by world number 66 Scott Donaldson.
World number one Selby looked good at 2-0 in front with a break of 68, but it proved to be his highest break as Scotland's Donaldson hit back.
Donaldson, who came into the tournament on a 10-match losing streak, made breaks of 90, 87 and 77 to go 5-3 up.
He kept his composure in the ninth frame with a nerveless 84 to advance.
Opponents 'overperforming' against Selby
Selby, the world champion, had already claimed one ranking event this season at the International Championship and was looking to win his third title in York.
But he was not given a chance of making any sizeable contributions once his opponent levelled at 2-2.
"I did not do that much wrong," said Selby. "Scott played absolutely unbelievable and to play like that on the main stage is remarkable. I have been saying all season, everyone seems to be overperforming against me.
"Every time I had a chance, I needed to make something but every time he had a chance the balls were set for him. He took them and closed the match out really well."
Donaldson only won his first match of the season against John Astley on Thursday.
The pair met at the English Open earlier this year, where Selby won 4-3, but this was the 23-year-old's biggest victory of his career.
"I am calm, it is another win for me, I do not care who I play," said Donaldson. "I had good chances in the balls and I capitalised on them.
"It has been well documented that I have not won a game this season, but I have had a lot of cue problems. I am happy with it now and it is playing better than before."
Trump feels pressure of BBC events
The 2011 champion Judd Trump thrashed Chris Wakelin 6-0 to reach the third round.
Trump's highest break of the match was 61 as he capitalised on Wakelin's errors to progress.
That win six years ago remains the world number two's only victory in a BBC 'Triple Crown' event of UK, World and Masters titles.
Asked by BBC Sport whether he feels more pressure in those tournaments, Trump said: "I would say yes. They do not come round very often, only three a year and are so big in our country.
"It is the only chance my parents get to watch me. There are a lot of tournaments I win away from home so it would be nice to win in front of them."
Analysis - a Selby collapse
Six-time UK champion Steve Davis on BBC TV
This can always happen but the way Donaldson closed out the match was very impressive. He held himself together when his head would have been spinning.
From Selby's perspective, he was 2-0 in front and you very rarely see a collapse like that. It seemed like he took his eye off the game, took his foot off the gas and he looked like a beaten player at times. Amazing.
Selby felt his form in the early part of the season was not good and he was searching for answers but then he won an event and it looked like being back to normal.
You would think he would go from strength to strength in the major events but form will not always be the same. You go through highs and lows and it looks like he has hit a brick wall.
Comeback win for Robertson
Elsewhere, two-time winner Neil Robertson had to come from behind to win 6-2 but was in high-scoring form against Ken Doherty.
The Irishman led 2-1, but Australia's Robertson - just like he did in his first-round win over Rod Lawler - made three straight century breaks to advance.
Robertson said: "It is showing how hard I have been practising for months and it is paying off. It is clicking for me and I am 100% focused on my snooker.
"Ken made an incredible start in the match, he looked fantastic and the few Irishmen in the crowd were quite vocal too. It made for a good atmosphere."
Veteran Jimmy White, now 55, is competing on the tour after receiving an invitational card having lost his place last year.
Although he earned an impressive 6-2 win over Ali Carter in the first round, the 1992 winner was well beaten 6-2 by Norway's Kurt Maflin.