But RMC says Pogba has now put talk of a move to bed by vowing to stick around in Manchester until the end of the current campaign.
The 2018-19 Premier League season began on Friday with a single match.
Mourinho, missing several midfield options due to injury, praised Pogba for his willingness to start the game after only recently returning from his post-World Cup break.
Manchester United finished 19 points behind Premier League champions Manchester City last season, while bitter rivals Liverpool FC have spent nearly £200m on new signings this summer.
He said: "Have to say.well I don't have to but I will.Paul Pogba's performance after everything that's happened to him over the last month or two, as well as the lack of pre season training, has been truly remarkable".
They got the three points and most of their shots were on target but United still looked bad in the final third for most of the match.
However, clubs in the Premier League can still still sell players or send them out on loan to non-Premier League clubs.
The two-time Champions League victor added: "At this point I'd just say we need to win".
"So for me it's a big season for Paul Pogba, it's a good move, let's see how Paul Pogba gets on tonight".
"The team played as a team", Mourinho said. "I think we are more the head coach than the manager", Mourinho told Sky Sports.
But for all that could have been this summer, Mourinho certainly has the talent at his disposal to make this a successful season, especially if Pogba can replicate Friday night's display.
Leicester will hope this is a good time to play the Manchester giants as they have a number of players injured or not match fit so Claude Puel will be hoping to take home at least a point this evening.
"The time has come for United to win more trophies".
"But you don't win anything with second and with Liverpool and Man City looking stronger than ever, I worry for them", he said.
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