"I asked him if he was Dele or Dele's brother", Mourinho explained ahead of Saturday's Premier League match at West Ham.
Guardiola confirmed two other injury concerns from the Chelsea win - Rodri and David Silva - were minor cramp-related issues which will not rule them out of the Shakhtar game, for all that they are unlikely to start.
Emerson Palmieri was in the starting XI as Chelsea thrashed Arsenal 4-1 in the Europa League final played in Baku, Azerbaijan last season.
That was the verdict of former Premier League referee Dermot Gallagher, who analyzed the incident that led to the unauthorized goal, as a video advocate's check overturned the original decision for the objective to stand.
The Brazil striker, 22, will lead the line against Shakhar Donetsk at the Etihad Stadium on Tuesday night (8pm) as Manchester City seek a point to wrap up qualification for the Champions League knockout stages.
But Guardiola believes it is ridiculous to expect City to be able to keep on improving on the levels they have shown in previous seasons. Liverpool have now won eight points from goals coming after the 85th minute this season as they remain unbeaten in the league, having dropped points just once. In golf, it's not always Tommy Fleetwood who wins the tournaments, I would like that, but it's not. "I would like to see us there, nine points, we are in November so wow, many games we have to play".
We are already in a strong position domestically and the Citizens winning Europe's top prize as a nightmare for Scousers.
Guardiola also feels that putting too much weight behind a defeat is a worrying trend for society at large.
"We did it for the last 24 months or more". If you lose then it is done. I think for sport, it is a message to society, it's not good for our kids to show that just the victor is ideal. We wrote how Joe Gomez was living in Guardiola's head after clubs got their players back from the global break and the City boss can't escape the Reds.
"It is not. Important is the effort, the commitment, the situation".