Mourinho was praising of Wolves but not of his own who he felt were below par.
He has scored only three times in 23 games since, the last in April's FA Cup semi-final against Tottenham Hotspur.
TUKO.co.ke previously reported that United began their UEFA Champions League campaign in Group H, on a high note thrashing BSC Young Boys 3-0 on Wednesday, September 19, and picking up maximum points.More news: Militants kill Iranian troops at parade
United looked to have weathered a strong opening by Nuno Espirito Santo's team, most notably when keeper David De Gea made a spectacular save to keep out Willy Boly's goal-bound header from a Joao Moutinho corner.
"I could go in this direction but Alexis Sanchez and Jesse Lingard didn't play.
They started better were more aggressive, had more intent and I don't know why but they were more motivated", the United manager said.
"So I think, yes, it's a mental situation, an attitude. For me it is hard to explain that", he said.More news: Oil holds near $80, supply concern expected to underpin prices
The rumours have only been heightened following reports from The Mirror that the Spanish giants plan to watch every game the Frenchman plays from now until the end of the season, before launching a bid for the World Cup star next summer.
"I thought it was a point deserved, but we had the chances that showed with better decisions we could have won", he said. We come home with a good spirit, we come home let's say in peace because we recover.
"Because Martial played 90 minutes and Sanchez played zero".More news: Cleveland Browns Instant Reactions: Baker Mayfield era begins
"Big stability in the team, the young ones are young boys with good potential and you can see the work of the coaching staff and the team is a really really good team". "One team was coming to play the game of their lives, and another one was too relaxed". "And I think we have to do better".