Speaking after Tuesday's 2-1 win over CSKA Moscow, Mourinho was not buying it and grouped Guardiola's claims with those of Arsene Wenger, the Arsenal manager who said Alexandre Lacazette would not face United last weekend before he promptly played and scored in the Emirates Stadium thriller that the visitors won 3-1.
For large periods on Sunday, however, City were frustrated by an organised West Ham but their sheer will to win proved too much for the Hammers as Guardiola's side restored their comfortable lead ahead of next weekend's Manchester derby.
De Bruyne, however, rejected the notion of karma, which is a spiritual principle of cause and effect, part of religions including Hindusim, Buddhism, Jainism, Sikhism and Taoism.
"I'm a very straightforward guy".
"All three played a certain way and got joy with certain things - counter-attack has been a problem for City this week, set-pieces and corners have been a problem this week, deep and compact defences have also been a problem this week in terms of breaking them down. It's a competition, you want to play against the best teams and the best players", the City talisman added. "We need to keep focused with whatever we are doing and keep busy with ourselves". He's a massive player.
Pogba, prior to his red card against Arsenal, is hoping City pick up injuries to key players.
He said: "Congratulations to them, it was a good game".
Mourinho confirmed that Zlatan Ibrahimovic, who has not been involved in United's last two matchday squads as he continues his recovery from a long-term cruciate knee ligament injury, has a "big chance" of featuring against City.
Ederson was the first to talk, and claimed it's been happening for a while now: "I think it's the third consecutive game that we find it hard to reach the opponent's goal".
"Leroy [Sane] needed time to adapt a bit - to the way we play". We are in a good moment. "Even if I'm not there, I'll be there watching the game, giving positive energy and, hopefully, we're going to win", the 24-year-old told reporters.