Wigan Athletic manager Steve Bruce has suggested that Cristiano Ronaldo and Carlos Tevez would find it 'very difficult' if they were to leave Manchester United.
Both Ronaldo and Tevez have been linked with moves away from Old Trafford, with the latter's future the most uncertain as he nears the end of a two-year loan agreement.
Portugal winger Ronaldo, meanwhile, continues to be mooted as a target for Real Madrid, and his act of petulance at the weekend did little to quell the speculation.
Bruce is to lock horns with his former side on Wednesday night and he has warned United's stars to think twice about leaving the Premier League champions.
Modern playerHe said in the Guardian: "Once you leave Old Trafford you find it very difficult. It's a step down.
"Not many have gone on to do well elsewhere and that applies whether you have been a reserve or have been in the first team for 10 years. It is very, very difficult to adjust.
"The modern player must accept that to be involved at the top - especially when they have been involved in five competitions and can win four this season - you don't have to play 60 games a year like we did.
"It takes about 18 games to win the UEFA Champions League so you need a squad of players capable of handling the big games."