His return has placed question marks over the future of Cech but Courtois insists he wants to learn from the experienced shot stopper.
Instead of drawing the battle lines, then, the Belgian appears to offering his hand out to suggest the two can work together.
“Petr has had a really nice 10 years here. He’s one of the best goalkeepers in the world. You can learn a lot from every keeper you train with," the 22-year-old said.
“Every goalkeeper can have a type of thing they are usually good at so when you see them train you can learn from him and other keepers, too. It helps you during your training."
So... encouraging words for Cech that could see the veteran stay at Stamford Bridge?
Unfortunately, you may have to think again.
For as long as Cech has been at Chelsea, the 32-year-old has been the club's undisputed no.1. The arrival of Courtois has put that into jeopardy and the prospect of playing the role of mentor may not exactly make Cech jump at the chance to remain in west London.
The Czech's agent has previously discussed a move abroad and, if Cech falls behind Courtois in the pecking order, that will seem a likelier option by the day. Only the promise of regular games - at the very least in Europe and cup competitions - would surely encourage Cech to stay.
Instead, Courtois's recent comments suggest the 32-year-old could be playing a role more similar to Didier Drogba - bit-part back-up whose main role is to help teach younger players.
Will that be enough for the experienced shot stopper? Chances are, he will want much, much more.