The 30-year-old signed a new deal at Old Trafford over the summer and came into the side for the win at Burnley ahead the global break, with Mourinho's side having lost to Brighton and Tottenham before visiting Turf Moor.
Pundit Jamie Carragher suggested that Rashford was not being played enough under Mourinho, and may need to leave his boyhood club in order to fulfill his full potential.
But Mourinho insisted that Pogba has given him no indication that he is unhappy at Old Trafford and that if he or his agent wish to pursue a move, they should tell him directly.
United will begin their 2018-19 Champions League group-stage campaign with a clash against Swiss outfit Young Boys on Wednesday night.
Putin inspects war games billed as Russia’s biggest-ever
He also said that the Russian armed forces will be further boosetd, supplied with weapons and equipment of latest generations. He commended them for their "high-level performance" in the "most active stage" of Vostok-2018.
Gracia conceded United were the stronger side in the first half, but believes his side showed the character he wants from them.
"I was surprised but it was the decision of the coach of course".
"I am very happy with the spirit", United manager Jose Mourinho said.
Two of the players Mourinho mentioned in his defence of Rashford, Solanke and Loftus-Cheek, had previously failed to break into the first team at Chelsea during the Portuguese's second stewardship at Stamford Bridge.
"Then we go to two matches away - hard matches, difficult stadiums, Burnley and Watford - and I felt that my central defenders need, especially in the moment of a bit of instability, they need somebody to support them, to give them the first wall - physicality - but Marouane is giving us more than that". It's something we've been trying to do, really - score more goals from set plays and create more chances and try and come up with things to do that.
"We know what is a goalkeeper from a big team, some matches you don't touch the ball, in some matches you are just somebody that is watching the game but in the right moment you have to be there and his moment was in the last minute".
Further statistics also back up the United manager's claim - Opta data suggests that Rashford has made more Premier League appearances (126) than any player and played more minutes of competitive football (7280) since he made his debut in February 2016.