Pogba joined United for a then world record £89m in August 2016, but fell out of favour at times during the 2017-18 campaign.
Mourinho is entering his third season in charge at Manchester United, and will look to build on the team's second-place finish last time out.
However, the 25-year-old was instrumental in France's triumph in Russian Federation, particularly in the final, when he netted the third goal for Didier Deschamps' side against Croatia.
That all but secured the victory, though Hugo Lloris did his best to let their opponents back into it with one of the most calamitous mistakes in World Cup history. It's hard to say that to win the World Cup is not good for a player's career.
"I want to thank everyone, the managers, coaches, the medical department, everyone who helped me to settle in so quick at the beginning, of course my teammates and last but definitely not least the fans!"
Ibrahimovic said: "I played with him for two years and people like to give their opinion, which they have the right to do". I feel really strong and good.
Tottenham transfer news Parlour says Alderweireld's situation is similar to Alexis Sanchez
"In the quarter-finals, semi-finals and final he was absolutely brilliant".
Mourinho, speaking in Los Angeles, said: "I did with Paul what I did with all my players". "I sent a nice message before the World Cup and during it I did not disturb anyone".
The 29-year-old winger could not win the coveted trophy with his team but he did score a wonderful goal against France to level things up when they were down 1-0. Players are given a minimum of three weeks off after a major tournament.
Jose Mourinho takes his squad back to UCLA as Manchester United begin their pre-season. "I've no idea. I'm not going to lie to you, I'm not going to say somebody is coming or nobody is coming".
Reports suggest Sanchez is working with lawyers to get clearance to join up with the rest of the squad.
Luke Shaw, Andreas Pereira, Antonio Valencia, Anthony Martial as well as Chris Smalling were all on parade during the basic warm-up exercises to loosen muscles after a long flight.
Nuclear deal remains 'triumph of multilateral diplomacy' despite US exit: Zarif
French carmaker Renault, which does not sell cars in the United States , has said it will remain in Iran despite the sanctions. The EU fears that billions of dollars' worth of trade could be jeopardized as a result of Washington's new sanctions.