United will be without Phil Jones, Eric Bailly and Marouane Fellaini for Saturday's Premier League clash with Arsenal at the Emirates Stadium, while Nemanja Matic is a doubt.
The weekend's most high profile Premier League match, Manchester United at Arsenal, will be missing a few key players.
City have dropped just two points in 14 matches this season, and have developed a recent habit of grinding out late wins. They have not won 13 straight since 2005.
'I play a game at a time, ' said Mourinho. "Yesterday I was watching an interesting movie, Borg v McEnroe". It's just Arsenal. Focus on this game'.
"It's just Arsenal. We don't think about how many points we are ahead of them or behind the leader".
'It's hard enough for us to be focused on other things. "We focus on this".
However, the Portuguese insists his players must adopt the ethos of 11-time grand slam champion Borg and his coaching staff and take each game as it comes.
Supermoon to light up the sky this weekend
Some people, Joseph said, might not notice anything or just assume it's like any other full moon. With the total eclipse, it'll be a royal spectacle indeed: "a 'super blue blood" Moon.
It was then suggested to him that he was like McEnroe and Wenger like Borg, to which Mourinho replied with a smile: "No. I love tennis, I don't play tennis". "I don't play tennis".
However, he has rejected claims that he is too conservative with his tactics in big away matches.
"It depends with what you think about risk". I think in the beginning of football, the guy who decides to say defenders and attackers, this guy was bad.
"Because everybody has to defend and attack, especially in modern football, so for me you can say what you want".
Mourinho, though, has promised to attack Arsene Wenger's team.
The Serbia worldwide limped out of the 4-2 win over Watford on Tuesday and Mourinho was anxious the midfielder had picked up an "important" injury.
Speaking in his pre-match press conference at the Aon Training Complex on Friday, Mourinho was asked about the availability of Fellaini and his fellow midfielder Nemanja Matic, who was forced off in the second half at Vicarage Road. I hope he can, he wants to [play] but I cannot guarantee.