United boss Ferguson has regularly changed his team around this season due to injuries and the number of games the club have played.
The alterations have not affected the team's bid for honours, with the Fifa Club World Cup and Carling Cup already won, and the Red Devils in a promising position in the Premier League, FA Cup and UEFA Champions League.
Ferguson concedes it is difficult to leave a player out after an impressive performance, but has hailed the manner in which his players accept the changes.
Marvellous"The attitude of the players has been marvellous, especially when it comes to the business of being left out," said Ferguson. "There have been no dummies flying out of the pram.
"I hate telling a player that, although he has perhaps just delivered a top-class performance, I will not be using him in the next match.
"It's not nice, but it helps that the players understand."
The United chief also praised the form of John O'Shea, with the versatile Irishman having started regularly at right-back in recent weeks.
Ferguson added: "I feel blessed that we have players like John O'Shea, who has stepped in to play out of his skin.
"John has thrived on playing regularly and I'm sure that if I asked him to play at centre-forward he would get us a goal.
"It's great to have such adaptable players and it's one of our strengths as we enter the last lap of the title race."