Chelsea, the defending champions who are looking to win the competition for a fourth time in five years, secured their place in round five with a 4-0 fourth-round replay defeat of Brentford on Sunday and will face npower Championship side Middlesbrough next.
The winner of that tie will then play either runaway Barclays Premier League leaders United or Reading in the quarter-finals, with those teams playing their fifth-round clash at Old Trafford on Monday night.
Source: PA
Source: PA