Despite only coming up against each other once since Mourinho succeeded Mancini at Inter Milan in 2008, the pair have a perceived rivalry.
Mancini said: "Congratulations to him. To do 100 caps in the Champions League at his age (49) is very important, but I think (the game) is not Mourinho against Mancini but City against Real Madrid.
"That is more important. The players are more important than us."