Organisers are calling on Man Utd fans taking part in the singing section experiment at Old Trafford on Wednesday to get there early.
The Champions League draw takes place on Thursday in Monaco, with Manchester United and City waiting to hear who they'll face this autumn.
Mourinho says Real Madrid versus Manchester United Champions League clash is the 'match the world is waiting for.'
It's the champions of England against the champions of Spain.
For the first time ever in a competitive match Manchester City face the mighty Real Madrid. Ahead of the game both managers have said they believe City will one day be crowned the Kings of Europe.
Daniel Hewitt reports.
Robin van Persie will return to the Manchester United starting line-up as they open their Champions League campaign against Galatasaray at Old Trafford.
The Dutchman was limited to a subsitutes' role in the weekend win over Wigan as Sir Alex Ferguson vowed to take no chances in Europe following last term's group stage debacle.
Shinji Kagawa and Antonio Valencia are also expected to be recalled, along with Patrice Evra.
Provisional squad (from): Lindegaard, De Gea, Rafael, Ferdinand, Vidic, Keane, Evans, Evra, Buttner, Valencia, Anderson, Powell, Kagawa, Cleverley, Scholes, Fletcher, Carrick, Giggs, Nani, Van Persie, Welbeck, Hernandez.