William Gallas believes Arsene Wenger's time at Arsenal is coming to an end and that he lacks the winning mentality of his managerial nemesis Jose Mourinho.
The Frenchman has failed to win the Premier League since 2004 and watched from the stands as his side fell 12 points behind leaders after defeats by Watford and the runaway leaders.
And the former Premier League defender believes a change may be necessary at the Emirates Stadium if the Gunners are to consistently challenge for silverware.
Talking to talkSPORT, the former France international said: 'You get criticism when you don't win trophies, when you don't win games, and that is maybe the difference between Jose Mourinho and Arsene Wenger.