But, as United prepare to face Sevilla in the second leg of their Champions League round-of-16 clash on Tuesday having drawn 0-0 in Spain, they need to start getting more out of the former Arsenal and Barcelona attacker.
"There wouldn't be many United supporters before saying there's an outstanding chance of us winning the Champions League, but when you sign somebody like him it can be the turning point in your season in the biggest competition there is".
"They're on a roll, but we hope to interrupt United's good run".
"Liverpool was Liverpool, it was a big match, a match against a direct competitor for the top four, but nothing is decided yet". We don't have many with that know-how.
"But Sevilla and (the FA Cup quarter-final against) Brighton are live or die games, so the next two are much more important". "I imagine that if we lose against Sevilla everyone will have forgotten what we did in the last couple of weeks".
The 24-year-old who has been dropped this season may find it tough to get back in the starting line-up after United's impressive first-half display against Jurgen Klopp's side.
He said: "We have to forget this defeat and think about Tuesday".
"To keep going and try to get through to the quarterfinal would be great for us".
Sevilla defender Clement Lenglet, meanwhile, believes his side are ready for the Red Devils and warned that United will see the best of the La Liga side if they score first.
The decision to not go looking for an away goal against a side that has lost heavily to the likes of Spartak Moscow, Eibar and Real Betis this season will come back to haunt Mourinho if United fail to progress.
United's midfield three of Romelu Lukaku, Alexis Sanchez and Juan Mata in the first leg was designed with counter-attacking purposes in mind - a triumvirate capable of supplying and finishing off one killer pass to make all the difference - but it ultimately caused the visitors to stagnate and regress during the game.
"We are a strong team once we take the lead". Two first half goals from Marcus Rashford sealed victory for Man United in an intense encounter at Old Trafford which also saw Eric Bailly put the ball into his own net. "He plays like he's already played five or six years in the Premier League, but he's still young".