Manchester United's stars arrived at training on Monday morning after manager Jose Mourinho fired them all a warning.
United's top four hopes are in jeopardy after failing to break down West Brom on Saturday.
They have now drawn five of their last eight games in the Premier League.
Mourinho was left fuming with numerous individual performances in their draw with the Baggies and suggested that he could give up on the top four in order to focus on the Europa League if results don't pick up this week.
United host Everton on Tuesday night before travelling to struggling Sunderland at the weekend.
“Against Everton, we’re going to try to play with our best team and try to win. After that we go to Sunderland with the same perspective," Mourinho said.
"Then the Europa League comes, and then I don’t know...
“Then, it’s possible that you will see me play in the Premier League with a team where I’m going to protect the players I consider fundamental for the Europa League.
“But only – only – if the results in the next matches put us in a situation where, mathematically, it becomes almost impossible to make the top four.
“Until it’s impossible mathematically, we’ll keep trying, because this week is a week without the Europa League.
“This week is easy from the focus point of view. We have to play two matches, and we have to go for them thinking about the Premier League, nothing else.
“Then we have Anderlecht and the quarter-final, first leg of the Europa League, which is very important for us.”