Football’s bad-boy grabbed his opponent around the neck and wrestled him to the ground during a ‘friendly’.
The pair were separated by players and staff but Barton continued the row by jabbing his finger towards Istres striker Guy-Roland Niangbo and his team-mates.
QPR midfielder Barton is still serving a 12-match domestic ban for his madness at Manchester City on the final day of last season.
But he left his team-mates in no doubt that he cannot wait for his first Ligue 1 match with a committed display during the kickaround.
Source: The Sun
