- O'Sullivan lost three of his four games at the Leicester Arena on Wednesday
- The seven-time world champion's form did not improve much in the competition
- He apologized for one of his antics during his 3-2 loss to Robert Milkins.
Ronnie O'Sullivan has withdrawn from the Championship League after a series of bizarre antics during a defeat in their penultimate group game.
The snooker legend lost three of his four matches on Wednesday and appeared to struggle with the tip of his cue on numerous occasions.
O'Sullivan returned to the Leicester Arena on Thursday morning to face Robert Milkins, but suffered the same result as most of his matches the previous day. At several moments the seven-time world champion's emotions seemed to take over.
He could be seen hitting the table with his cue after losing a pot. O'Sullivan quickly apologized to the referee and his opponent after the incident.
He later fired a white ball into a group of reds, allowing Milkins to claim a 3-2 victory.
In another notable incident, after missing a routine blue bounce, O'Sullivan appeared to perform a lewd gesture by spreading his legs in a crouch, sticking out his tongue and moving his cue back and forth from his waist.
Ronnie O'Sullivan pulled off a series of bizarre antics during his Championship League defeat to Robert Milkins at Leicester.
The 49-year-old quickly apologized to the referee and his opponent after slamming his cue on the table.
O'Sullivan had lost four of his five matches in the competition before deciding to retire
The Rocket were due to play Ali Carter in their final group match on Thursday afternoon, but decided to withdraw from the competition.
Commentator Dave Hendon explained: “Ronnie O'Sullivan we saw earlier was clearly frustrated against Robert Milkins. He has made the decision to withdraw from the tournament so will not be playing his final match against Ali Carter.
'It means that all the games he was involved in were cancelled, so he is at zero (points).
'Effectively now it is a group of six men. Still, the top four will go through (to the semi-finals) and only one player apart from O'Sullivan will be relegated.'