Newcastle boss Alan Pardew has told midfielder Cheick Tiote to keep his tough-tackling instincts in check.
The Ivory Coast international has been one of the finds of the season since signing from FC Twente in August, effectively anchoring the Newcastle midfield.
But the 24-year-old's disciplinary record has left something to be desired as he returns from his third suspension of the season for Tuesday night's home game against Premier League leaders Manchester United.
Tiote racked up five bookings by the middle of November to receive a one-game ban before being sent off in the FA Cup third round defeat at Stevenage on 8th January.
He has just been suspended for the two matches after reaching 10 bookings so has missed five of Pardew's 16 league games in charge through suspension.
Pardew acknowledges that Tiote is a vital figure in the Magpies team but the manager has urged him to tone down his enforcer role as Sir Alex Ferguson's men visit St James' Park.
"I haven't had that many Premier League games but he has missed five of them, and that can't be right," he said. "He can be overzealous at times.
"The referee will be important in this game. I don't want the Manchester United factor, with Alex and the way he is with referees, to come into play.
"It will be important for Alex and myself that 11 players are on the pitch at the end of the game because there is going to be a bit of feistiness in it.
"It's an important balance and he (Tiote) needs to get that right," Pardew added.
"He is important to us and we have missed him. We missed him against Aston Villa with the pace they have in the team and having him back in the side is going to help us considerably."
United are looking to bounce back from Saturday's FA Cup semi-final defeat by derby rivals City and will be keen to move a step closer to clinching the league title.
But Pardew insists his side will be determined to inflict another blow to the visitors' ambitions.
"They don't lose two games back to back often, so that makes it a little bit harder, but the motivation of Manchester United is always the same," he said.
"They are expected to win and they will be coming to St James' to win, but they are going to find it a tough game."