Manchester United legend Roy Keane says Joey Barton is now a "liability" for QPR.

Keane wrote in his column for the Sun on Sunday: "I never rated Joey Barton that highly as a player. I played against him when he was younger and he never stood out for me.

"Since then, I have never seen him dominate a game - or be the difference between two sides.

"And because his footballing ability is never going to get the headlines, he seems determined to get attention by whatever means necessary.

"He seems to thrive off people having a go at him and then having a pop back.

"Maybe I should open a Twitter account to keep him happy.

"But after landing a 12-match ban for his carry-on at Manchester City on the final day of the season, rather than just lashing out at anyone who criticises him, maybe he should consider keeping quiet and going about his business.

"Because the reality is that he has become a liability for QPR."