Manchester United midfielder Juan Mata says they must heed the lessons learned from Friday's FA Cup draw at Cambridge United.
Mata wrote on his personal blog:
"As you know, last Friday we drew with Cambridge in the FA Cup. It was a very physical game, played in tricky conditions, and now there will be a replay at home to try to get to the next round. On paper, it may seem easy to beat a team of a lower division. It is not.
"We just have to take the example of Saturday, with two big clubs being knocked out at home. It reminds us that the FA Cup is full of surprises. Also, it should be a warning sign for us ahead of our replay."
