The Premier League has now confirmed that Manchester United against Liverpool will be decided only two days after United's league match against top rival Leicester.
The reason why the game schedule is now tighter for the Red Devils is that the rival meeting, which should have been played this weekend, was postponed because Manchester United supporters protested against the club's owners.
Thousands of people were outside Old Trafford, and hundreds invaded the arena.
In the league, United are second with five rounds left to play, city rival Manchester City can secure the title with a victory against Chelsea this weekend.
And Liverpool are seven, seven points up - with one match to spare - to fourth place, which gives Champions League games next season.