Why a FA Cup last 64 match is being played the day before the last 32 games?

The Tranmere Rovers v Watford last 64 match- the replay- was supposed to be played on 14th January, but the referee was forced to call the game off due to the weather.

Heavy rainfall forced the FA Cup game to be called off. So much so that the last 32 draw is already known despite this match not being played.

In fact, almost 24 hours after the match ends between the aforementioned teams ends, the last 32 to will get underway with Northampton facing Derby County and QPR facing Sheffield Wednesday.

Quite a strange circumstance due to the intense rain that hit several parts of England. With the tight schedule in England (Watford played on 18 and 21 January), the 23rd was the only day available to play the match.

The winner of the match will face Manchester United in the last 32 of the FA Cup.