Chelsea boss Jose Mourinho has dubbed Thibaut Courtois the "best young goalkeeper in the world".

Courtois has arrived to challenge Petr Cech for No1 status at the Blues.

"It's a good problem for me," Mourinho said. "Thibaut just arrived, he arrived as the best young goalkeeper in the world. They will fight and for me it is a good.

"I was never afraid to make big decisions. I prefer to make this decision than to have a keeper I don't trust."

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