If they lose, rival Manchester City will be crowned champions.
'But listen, he scored two goals so it's not down to me.
Mourinho is not looking for his £89 million record signing to have that kind of impact every time he takes to the field, but he is calling on the 25-year-old to remove the wild fluctuations in form from his game.
I'd also become aware, as Oasis started to dominate the music scene, that City were the club you supported if you were from the centre of Manchester; they were, in many ways, the people's team there.
Manchester United's French midfielder Paul Pogba scores their second goal to equalise 2-2 during the English Premier League football match between Manchester City and Manchester United at the Etihad Stadium in Manchester, north west England, on April 7, 2018.
He said: "That's the challenge he has to put to himself - to keep a certain stability".
"Ask if I'm expecting Paul to be man of the match every week? No".
"So at every club at every level, from the top of the world until the amateur football clubs you need more than 11 players and only 11 can start, it is as simple as that, there is nothing I can do".
"I think he has to keep that stability and with that stability will appear the special match like it happened against City".
More "special" showings from Pogba before the end of the season should help to bring an end to the distracting transfer talk which continues to follow him around - with Pep Guardiola having revealed that the France worldwide was offered to City in January. Nevertheless, this time, it was United who turned the volume all the way up. Okay, they still haven't won it, we would like to think that they are going to win it. We are not going to do anything insane. After three important points last weekend we need to try to do this three and be closer to the end of the season and to the second position which is, in this moment, in our ambition.