Ahead of Tuesday evening’s clash between Manchester City and Barcelona, Mourinho gave his English rivals “a chance” at victory after labelling the current Blaugrana team as “the worst Barcelona of many, many years”.
Yet the Blues boss was proved wrong as Barca went on to win 2-0 at the Etihad, and their attacking midfielder felt Mourinho had gone too far in writing off the Spanish giants.
"He [Mourinho] should talk about Chelsea and their tie," said Fabregas. "I don't think he should talk about anything else. It is not his business.
"If we have to get motivated by Mourinho's comments, we shouldn't play football. We are top of the table, in the cup final, in a good moment in the Champions League.
"Some people want us to fail all the time, some people have been talking a bit too much, for a few days they will have to shut up."