QPR midfielder Joey Barton failed to return to the club for pre-season training this week.
The 30-year-old – who spent the weekend at the Glastonbury Festival - was absent when the rest of his team-mates reported to Harlington on Monday morning.
Barton spent last season on loan with Ligue 1 side Marseille, and has made it clear that he wishes to remain at the Stade Velodrome rather than return to Loftus Road.
Rangers boss Harry Redknapp admitted he is resigned to losing the former Newcastle United star, but the two clubs have failed to reach a settlement on his £70,000-per-week contract.
QPR declined to comment.
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