Every team has a player who makes the fans, the manager and his team-mates very nervous. This could be for many reasons - a lack of talent, a proneness to errors, off-pitch behaviour or simply the prospect they could lose their heads at any moment. Their individual flaws tend to work to the team's detriment, often throwing away results or causing rifts amongst the dressing room - sometimes with hilarious consequences.

This is a list of the Top 15 Premier League players, past and present, whose presence alone unsettles the rest of their team, with full details of why their team-mates can never fully relax around them. So read on and check out the stroppy stars, aggressive argumentalists and dubious defenders that are a constant thorn in their own club's side.

Click on William Gallas to unveil the 15