Chelsea goalkeeper Thibaut Courtois says he and Petr Cech are driving eachother to new heights.
The pair are regarded among the world's best keepers.
Courtois says: "It is not really that I will improve a lot by being at his side, but I know how he trains.
"The level we are at in training is so high that you improve.
"If he makes a great save, I want to make a great save too. So I think we keep each other at a very high level, which is really nice.
"He has been a world-class keeper for so long.
"If he says something, if he knows something you maybe don't know about the Premier League, I listen and can learn from that. It is nice to have."