Manchester United manager Louis van Gaal insists that Wednesday night's game against Crystal Palace is too important for him to field a weakened side, ahead of Saturday's FA Cup semifinal against Everton.
Van Gaal was questioned specifically about 18-year-old striker Marcus Rashford and pointed out that the player did not train for two days after the 1-0 win over Aston Villa on Saturday to give him a break.
With United needing wins to keep alive their hopes of a top-four finish and games running out, Wednesday's league game against Palace is not one they can afford to slip up in.
"Arsenal and [Manchester] City have a four-point gap. It is too important a game to rotate. We have to win," the United manager told a news conference.
"We are dependent on them [slipping up], we know that, but you can only give pressure by winning. So we have to look at ourselves.
"I have changed him [Rashford] after 70 minutes [against Villa], I believe, and that is also to give him a little bit of rest. He didn't train the day after and also the day after that he didn't train.
"I want to keep him fresh because he is in the momentum of scoring and that is very important for him but also for the team."
The Dutchman does not believe that the cup semifinal at Wembley will distract his men on Wednesday night.
"I don't think our players shall do that [lose focus] because we still have to qualify for the Champions League," he added. "It is important to beat Crystal Palace -- and they have the same problem. They are also in the semifinals and maybe they are thinking about that game. But we have to win our game against them."
There are no new injury problems from the weekend with Ander Herrera returning to the squad.
Discussing the progress of left-back Luke Shaw, following a double leg fracture, Van Gaal said: "He's doing great. He's training with the physio but he has to train with the football coach, and that hasn't happened yet."
Meanwhile, Germany head coach Joachim Low still has not ruled out Bastian Schweinsteiger for Euro 2016, telling Eurosport: "At the moment, I'm still full of hope that he will be ready by the start of the European Championship."