Another player suffering from injury is Alexis Sanchez.
Whereas England's Luke Shaw and Serbia's Nemanja Matic travelled back to Manchester shortly after sustaining injuries, Mourinho claims Chile, Belgium, Portugal and Scotland unnecessarily held onto their players.
Juventus' confidence is growing that they can be the ones to lure Manchester United's David De Gea away from Old Trafford. So when the players arrived here two days before [the] Chelsea [game], we have no idea of what is going on, but we have to deal with this and now we're trying to resolve problems a little bit step-by-step.
Mourinho pointed to Sánchez's injury problems to explain why the forward is struggling.
"He's struggling because he's injured", Mourinho said.
Sanchez's last goal came just before the global break when he headed the last-gasp victor in Manchester United's dramatic 3-2 win over Newcastle.
Mourinho is not confident he will be available to face Everton either and hit out at the Chilean FA, as well as other "unprofessional" associations, for failing to send back injured players during the global break.More news: Mattis expected to send hundreds of troops to southern border
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'I think I'm in a situation where I need to have a good balance between work and rest, ' Ibrahimovic told Sky Sports last week.
Jesse Lingard, who suffered a groin injury a month ago, may return against Everton.
Speaking at a news conference ahead of Sunday's Premier League match against Everton, the United boss was asked about the possibility and simply replied: "No".
"Now he's going back and to do the work to try and be 100 percent and in this moment he's nearly there because of the team's needs".
Here are three things we learnt from the match. "That is the question we have to answer or if we wait one more week".
In an interview with the club's official website, he said he was delighted to get a sustained run, explaining: "I feel good".