Courtois has helped Chelsea take control of the Premier League title race this season.
The Belgium international has kept 13 clean sheet as the Blues have raced 10 points clear at the summit.
Courtois signed for Chelsea from Genk in 2011 before spending three seasons on loan at La Liga giants Atletico Madrid.
Thibaut Courtois is happy with the coaches at Chelsea
Premier League stats: Which goalkeeper has the most clean sheets in 2016/17?
Wed, March 22, 2017
Express Sport takes a look at which Premier League goalkeeper has the most clean sheets so far in the 2016/17 season
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Which goalkeeper has racked up the most clean sheets so far this season?
Thibaut Courtois had to urinate in a bottle at Atletico Madrid
And the 24-year-old has revealed Atletico fitness coach Oscar Ezequiel Ortega made him wee in a bottle – so he could monitor his hydration.
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"He [Ortega] actually made us urinate in a bottle, to see if we were hydrated or not," he told BeIn La Liga.
"I am much stronger now, thanks to the Italian coaches at Chelsea, who have shown me new ways in which to play."
Thibaut Courtois is currently on international duty with Belgium
"They have influenced me just like their national goalkeepers – Gianluigi Buffon and Gianluigi Donnarumma."
Courtois is currently on international duty with Belgium.
The goalkeeper should start when the Red Devils go up against Greece tonight (7.45pm).