Rafael Benitez has accused Sir Alex Ferguson of snubbing his attempted handshake before the start of the FA Cup quarter-final at Old Trafford.Benitez admitted bringing on Hazard and John Obi Mikel had changed the match in Chelsea's favour. He said: "We knew that we had to change something and we knew Hazard is a player with quality who can make a difference and he had fresh legs as well. "I asked Frank (Lampard) to give 100% until then and he did. You have to manage the squad. "We saw the character and the reaction that I was expecting so until the end of the season we will be fighting." The winners of the replay will face Manchester City in the semi-finals but such is the fixture pile-up that there is no obvious date for that replay to take place. Benitez said: "I cannot say when I prefer, we have so many games it depends on the dates. It is an FA decision." Benitez refused to be drawn on speculation Rio Ferdinand may face FA action after an altercation with Fernando Torres. "I haven't seen the replay - you can see the replay," he said when asked for his response. "You have an advantage and can do it now." Benitez also confirmed he had spoken to Torres about the matter but would not go into any details. "I don't talk about things that happen on the pitch," he added.