Samir Nasri once threatened to fight Roberto Mancini and insulted assistant David Platt during Manchester City training session, Joleon Lescott recalled.
The Frenchman had a reputation for being a dressing room firebrand, with former team-mates often recalling examples of his temper flaring.
Lescott revealed one fracas in the build-up to the October 2011 derby, in which City beat Manchester United 6-1 at Old Trafford, when Nasri was unhappy with how he had been treated.
'He [Mancini] used to do the prep in the middle of the pitch and he's telling players what he wants,' Lescott told That Peter Crouch Podcast.