Watford could play four games in nine days following the postponement of their FA Cup third-round replay at Tranmere due to heavy rainfall.
The rescheduled match will now be played next Thursday (23 January), following Saturday's game against Tottenham and Tuesday's meeting with relegation rivals Aston Villa.
If they defeat Tranmere, Watford will play either Wolves or Manchester United on Sunday, 26 January.
The teams drew 3-3 in the first game.
The Football Association said: "After consultation with all the relevant parties, in order to keep the competition on track and reduce the risk of causing fixture disruption elsewhere, the match has been rescheduled for Thursday, 23 January - 19:45 GMT kick-off."
|Watford's fixture congestion|
|Saturday, 18 January - v Tottenham (h)|
|Tuesday, 21 January - v Aston Villa (a)|
|Thursday, 23 January - v Tranmere (a)|
|Sunday, 26 January - Wolves/Man Utd (h) - if Watford beat Tranmere|
Liverpool Women's match against Manchester United at Tranmere's Prenton Park home was postponed on Sunday because of bad weather.
The first game between the clubs ended in a thrilling draw as the League One side fought back from 3-0 down.
In a post on Twitter, Tranmere said: "The ground staff have worked tirelessly over the past few days in an attempt to get the game on but were unfortunately beaten by the weather."
Tranmere had earlier said a normal pre-match pitch inspection was due at 18:30 GMT, but with more heavy rain falling the game was called off around 13:30 GMT.