And there was a fear Romelu Lukaku had also suffered an ankle injury during United's 4-0 win against Crystal Palace before he was called up by Roberto Martinez - despite Belgium already qualifying for the World Cup.
"I am sure he will be fine for Manchester United at the weekend".
But the Manchester United boss isn't anxious because he insists he has adequate cover in his squad.
"I like to play against the best teams, I like to play against the best clubs and I like to play at the best stadiums - the stadiums with more history", Mourinho told Sky Sports.
Mesut Ozil's Arsenal contract talks are progressing well, claims agent
However, his decision could depend on whether the team proves to be a genuine Premier League title contender this season. The Gunners are set to be without Shkodran Mustafi for the game as the defender's thigh injury continues to be assessed.
Jose Mourinho has played down Manchester United's injury problems after offering updates on Marouane Fellaini, Paul Pogba and Romelu Lukaku ahead of Saturday's trip to Liverpool, according to the Daily Mail.
No, the problem comes through the nature of these contests, and the one which oversaw Fellaini's injury serves as a flawless example: the mixture of a bad pitch, the pointless nature of the game (Belgium qualified for the World Cup back in September), and an nearly 3,000 mile round trip was a recipe for disaster. We may cry with the process that leads to the injuries but we don't cry with the injuries.
The injury is expected to keep Fellaini out for at least two weeks. We just trust the players that are going to help'. We lost players last season.
Manchester City needed to part with £54.5m to bring De Bruyne back to the Premier League, just one season after his permanent move to Wolfsburg from Chelsea under Mourinho.
Fellaini had been in fine form heading in to the worldwide break and scored twice during the 4-0 win over Crystal Palace last time out so many thought the news would come a disappointment to Mourinho. We lost players this season. But heading into their clash with Cyprus on Tuesday, Mourinho was hoping Martinez didn't play Lukaku - especially with their crunch match against Liverpool on Saturday lunchtime.