QPR's Barton in fresh controversy at Marseille
The Daily Mail says Barton has been involved in yet another heated spat during a friendly with his new club Marseille.
The midfielder joined the French side in August after copping a 12-match ban while playing for Queens Park Rangers last season.
But Barton has seemingly failed to change his ways since moving to the Ligue 1 side after he squared up to Istre's Guy-Roland Niangbo.
The dispute was the result of a wild lunge by Barton as he looks to build match fitness before he can make his league debut for the club.
But the incident comes just days after the 30-year-old clashed with AEL Limassol's goalkeeper Matias Degra in the Champions League.