Cech has scarcely let down Chelsea in a decade as first-choice goalkeeper, so Mourinho has no doubt he will keep the player a decade a junior on his toes.
"I don't make decisions for the season, I make decisions for a match.
"Obviously a goalkeeper is not the kind of player you change match after match, you must give a bit of stability, but this is about performances so Thibaut has to know that having a goalkeeper of Petr's level sitting on the bench, it means from him (we want a) high level of performances.
"Ten years ago I also had a very difficult decision to make when we had (Carlo) Cudicini giving fantastic performances in Chelsea's goal for many years.
"I had in my hands a 22-year-old goalkeeper I thought could be in Chelsea's goals for years and years and years and this situation is quite similar."
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