Manchester United were in inspired form as they destroyed Arsenal 4-0 at Old Trafford to advance to the quarter-finals of the FA Cup.

The Gunners may have opened up a five-point lead in the Premier League but they were completely outplayed as United raced into a 3-0 lead at half-time.

Wayne Rooney, who produced a dazzling display up front, headed United in front after 16 minutes and Darren Fletcher got in front of William Gallas to nod in Nani's excellent cross four minutes later.

Nani added a third with a powerful finish on 38 minutes and things went from bad to worse for Arsenal after the break as Emmanuel Eboue was sent off for a kick on Patrice Evra.

Fletcher headed in a fourth in the 74th minute as United cruised through the second half, and Arsenal had no answer as they meekly bowed out of the competition.