Under-pressure Manchester United manager Louis van Gaal enjoyed a rare highlight after weeks of gloom when his side comfortably beat Derby County 3-1 to reach the FA Cup fifth round.
Goals from Wayne Rooney, Daley Blind and Juan Mata put the 11-times Cup winners through, with second-tier Derby only briefly threatening a shock when George Thorne equalised shortly before the break at a noisy Pride Park.
Dutchman Van Gaal has been under mounting pressure after a recent poor run of form and shortage of entertainment, but United were good value for their forurth-round win.
Rooney put the visitors ahead with a superb curling effort after 16 minutes and United, cheered on by 5,000 visiting fans, should have been further in front before Thorne's expertly-taken equaliser with Derby's first meaningful attack.
Blind restored United's lead after 65 minutes with a sharp finish before Mata sealed the win late on.
The rest of the fourth round matches are scheduled for the weekend with holders Arsenal hosting second-tier Burnley on Sunday.