Like Anthony Martial, Victor Lindelof looked destined for the Old Trafford scrap heap earlier this season, although the Swedish centre-half has been earning rave reviews from United fans for his performances of late.
Mourinho was widely assumed to have been annoyed by Barca's decision to appoint Guardiola over himself in 2008 and the pair had a number of fractious encounters during their time together in LaLiga.
Former Manchester United star Ronaldo was seemingly not particularly impressed with the Red Devils' approach to the game and claimed that Juventus were clearly the better side on the night. Mourinho said: "Lukaku is training with the team this [Friday] morning".
But substitute Juan Mata's free-kick on 86 minutes sparked a stunning revival that breathed new life into the visitors' Champions League campaign.
"They had a problem for 10 minutes after Cristiano's goal but they were so stable with a lot of commitment, aggressive without the ball".
"So if we win we are not only winning three points but taking three points from them as well".
"It was great to see to see Paul again because we're good friends", he said. I think that is untouchable but what is behind [the scenes] I can not say.
"If you want to put the match into the context of where we are and where we can be, it becomes even more hard".
"We have to stop them in their attacks, there is a way to do it and the manager knows that".
"They have incredible talent up front and in the middle as well. I expect a hard game but, in a derby, everything is possible, and we will be ready for that".