Sir Alex Ferguson has hinted at a number of comings and goings at Manchester United this summer, as he attempts to bolster his squad for next season.
Ferguson accepts that he may need to make changes, with his side likely to finish the season with only the Carling Cup to show for their efforts.
He told MUTV: "You have to take a decision about where we can improve the team.
"When you are challenging for four trophies it can have a draining effect.
"You have to be aware of that and spot the moment when it is time to freshen up one or two players.
"It is not a desire to do it, but you need to do it because the demands and pressures on players can, over time, be quite exacting."