Robin van Persie's late strike kept the Reds' hopes alive but you will need to delve deep into the memory bank to come up with the answers to our latest teaser.
Name five players who have scored in FA Cup ties against United since 1970 and have also played for the Reds.
The men in question could either have joined United later in their career or already been an ex-player when they scored against us. Own goals do not count.
Check out the answers here.
More trivia questions: 3-2 comebacks | Earliest away goals at OT | Goalkeepers meeting the Reds | Oldest scorers in Premier League | Internationals at Old Trafford | Old Trafford penalties | England's seven Reds | Alan Hardaker Trophy winners | Scored against United | United stars at European Championship | Goals for England | The name game | Non-appearance at finals