The defender has displayed great flexibility ever since joining Chelsea from Marseille in 2012, and that has been evident again this season as he adjusted seamlessly to a role in their back three.
"Throughout my career, I've always been able to adapt to new positions and I think that made me better as a player," he tells Chelsea magazine. "It's crazy how football changes. I made my debut more than 10 years ago as a right-winger for Osasuna and to now be playing as a right centre-back shows you how much can change.
"I've taken on every challenge in order to improve myself. Whenever a manager has asked me to change, I've always tried to adapt quickly, to learn, and then to become a better footballer.
"When the manager signed here I knew he liked to play with three at the back and I thought I could play in the back three,' he adds.
"I was sure I could make it work, he gave me confidence, we trained hard to learn all the right movements and obviously it was a big change for me. I was more central and you maybe play more with the ball because we build from the back. I'm in possession more and there are no overlaps and not a lot of crosses from the wing but it's a role I'm enjoying."