Sunderland captain Dean Whitehead is concerned about El Hadji Diouf's reputation with referees.
Senegal international Diouf recently joined the Black Cats from Bolton, bringing with him a fiery temperament which has been known to get him in trouble in the past.
The Premier League will be implementing their 'get on with the game' initiative this weekend when the new season gets under way, concerned about the manner in which certain players are prone to confronting match officials when decisions go against them.
Club captains have been handed responsibility for controlling their team-mates, but Whitehead is worried that Diouf may find himself on the receiving end of unfair treatment.
"People will obviously know what Dioufy is about," said Whitehead.
"As captain and players we will have to make sure he doesn't get himself into trouble because referees will be after him I'd say.
"They target certain players and it's part of my job to make sure he doesn't react.
"What you see with Dioufy is what you get. You're not going to change the way he plays and the way he conducts himself but it's up to us to make sure he doesn't overstep the mark."