Manchester United boss Ole Gunnar Solskjaer is furious with the fixture schedule.
The Red Devils have to squeeze in their postponed Premier League clash with Liverpool in the coming week, while playing two more Premier League games.
United are through to the Europa League final after a 3-2 defeat to AS Roma in the second leg, as they won 8-5 on aggregate.
Now they take on Aston Villa in the league on Sunday, before playing Leicester City on Tuesday, Liverpool on Thursday and Fulham the following Monday.
"It's unheard of," Solskjaer told BT Sport.
"It's made by people who have never played football at this level.
"It's physically impossible for the players. We have not been dealt a good hand. We are going to need everyone [the rest of the way]. It's a short turnaround but we have to be ready.
"It feels good to be in the final. We played one very, very good half at Old Trafford which has taken us through."