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Denis Zakaria admits his time at Chelsea was a learning experience.
The midfielder played just 11 times for the Blues on a loan spell at Stamford Bridge last season.
The midfielder, now at Monaco, told RMC Sport: "I think in the end it wasn't easy but it was the moment when I learned the most in my career.
"After a period like that, you learn that nothing is taken for granted and you always have to work to be where you want to be. It made me think a lot.
"I try to work as best I can to live through this kind of period because for a player it is very, very complicated."
