Chelsea boss Carlo Ancelotti has described Sir Alex Ferguson's mind games as "clever" but claims he won't be joining in the psychological warfare.
United manager Ferguson claimed the league leaders have an "easy" game against Bolton on Tuesday night.
"At this moment of our season, nobody can lose his concentration or determination to win the title - only us - but I think that's impossible that can happen," said Ancelotti.
"I've never done mind games. I hope that Alex is correct but I think every game is difficult. It's mind games.
"Ferguson is clever. On paper, we are favourites against Bolton but only on paper. We need to go out and achieve this."
Ancelotti's team could go four points clear of United with victory over the Trotters, with the Italian admitting: "I would like my players to think it's a very, very important game; maybe the most important game of our season.
"The title is in our hands. We have worked all season to be in this situation. This has happened not because we were lucky, but because we worked very hard every day all season.
"There is no possibility that my players will lose their concentration. Chelsea want to win this title because we deserve to win this title. Until now, we've done better than the other teams."
Ancelotti will reportedly rest Deco, Joe Cole and the in-form Florent Malouda for Saturday's clash with Tottenham, bringing in Michael Ballack and Salomon Kalou.
