Courtois happy to undergo tests at Chelsea

Chelsea have put Thibaut Courtois through a series of tests during the Spanish Liga winter break.

Courtois is this season on-loan at Atletico Madrid.

"The tests showed that over six months I have become a lot stronger," Courtois told Voetbal Primeur.

"I can jump a foot higher than I could last year and my reflexes have also improved.

"Chelsea were especially impressed by my results in the stress test. Under great pressure I was able to continue coolly."

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