An irritable Ronnie O'Sullivan clashed with referee Desislava Bozhilova before crashing out of the World Snooker Championship at the quarter-final stage.<br /><br />The Rocket was beaten 13-10 by Stuart Bingham as his hopes of winning a record eighth Crucible title went up in smoke.<br /><br />But there was a flashpoint in the 21st frame when play was interrupted by spectators watching the adjacent match between Kyren Wilson and John Higgins returning to their seats.<br /><br />O'Sullivan was about to take a shot when he was distracted by the noise and movement across the auditorium and he opted to sit down until the crowd settled.<br /><br />Bozhilova attempted to prevent anyone else from entering the arena with the other match at the mid-session interval but wasn't successful.<br /><br />She said: 'They're not going to let anybody in. They're all sat down now. We might be waiting 20 minutes, you know what I mean?'<br /><br />When O'Sullivan finally returned to the table, he told the Bulgarian referee to 'just chill' before potting a long red.<br /><br />However, it wasn't the prelude to a victory as Bingham pulled away to win that frame and the next two.<br /><br />Earlier, O'Sullivan claimed 'the referees have got it in for me' after a contentious moment over a rolling black.<br /><br />In the 12th frame, O'Sullivan potted the black for 29, with Bingham on 43. However, when Bozhilova re-spotted the black, it obstructed his shot at the next red by rolling slightly closer to the cue ball.<br /><br />In a show of good sportsmanship, O'Sullivan offered Bingham the chance to look closely at the situation.<br /><br />After the black's position was adjusted slightly, he could have potentially potted the red but instead, O'Sullivan decided to play a safety shot. Bingham ultimately won the frame.<br /><br />During the break between sessions, O'Sullivan hit out at Bozhilova in an interview on Eurosport.<br /><br />'It's just a normal day for me, a bit of snooker, a bit of food, chill out, went to the gym this morning, nice day,' he said. <br /><br />'To be honest with you some of the referees have got it in for me. I just wanted to prove to her that she had got it wrong.<br /><br />'Then I thought I didn't feel good about having to pot the ball after that but I just wanted to make a point. The point was made.<br /><br />'I'm not that hungry to win in that way, I'm more of a principled person.'<br /><br />The Crucible semi-finals will see Wilson take on David Gilbert and Bingham play Jak Jones, with the two best-of-33 matches underway on Thursday.<br /><br />After his defeat, O'Sullivan said his 'arm was twisted' to come and compete at the Crucible this year.<br /><br />'I wasn't going to be playing in this one until a new sponsor came along and said [you need to play in it],' he said.<br /><br />'I wasn't going to play Manchester or this because of how I was feeling about playing. So they twisted my arm.
