United travel to Aston Villa on the Sunday before Leicester visit Old Trafford on Tuesday. The rearranged game with Liverpool, postponed on Sunday after fan protests, is scheduled for 48 hours later on Thursday.
“It’s unheard of,” said Solskjaer. “It’s done by people who have never played football at this level before. Physically it’s impossible for the players to do this after being here, Sunday-Tuesday, Thursday, it’s impossible. So we don’t have a good hand but we gotta play as well as we can.
“We’re going to need everyone in these four games. We have to see how we are doing on Sunday morning. We play at two o’clock on Sunday. It’s a short turnaround, but we have to be ready.”
United lost 3-2 to Roma that night but prepared with a final Villarreal in Gdansk after a 6-2 lead from the first leg. Edinson Cavani scored two goals to improve on his two goals at Old Trafford while David De Gea needed to be in tip-top shape and made 12 saves.
“David was vital, man of the game, stand out,” said Solskjaer. “The final is still three weeks away and there are a lot of games, but he performed well. You have to perform and you keep your place on the team if you play well.
“If you’re in a final, you have a chance. I’m so happy for the guys that they can look forward to something.”