Carlos Tevez (R) shoots and scores his 2nd goal against Fulham.
Wayne Rooney found the bottom-left corner for the net five minutes into the second half making it 3-0 to United. Ji-Sung Park's 81st minute shot went exactly where Rooney had sent the ball some 30 minutes earlier.
Fulham's best goal attempt came early in the game when an Andrew Johnson effort was met with a terrible mistake by Edwin Van der Sar resulting in the ball moving towards the line, where it was bundled off by Nemanja Vidic.
Chelsea's Didier Drogba celebrates his goal.
Manager Guus Hiddink praised Drogba describing him as a dangerous striker. "He is working hard and he is good for the team". "He, however, still has to make some small improvements in his game," the manager added.
Hiddink said that his side would keep up the pressure on Manchester United "for as long as they can mathematically catch them."
The Blues and The Reds could meet up at either the semifinal or the final. In other FA Cup matches Everton takes on Middlesbrough on Sunday, while Arsenal and Burnley meet in a fifth-round tie.