Here is his post:
And here is the text in full:
Thanks Chelsea for the three and half years of great partnership. I've made good friends, won many titles and those memories will last with me for ever. I'd like to thank my team mates, all staff and supporters (my geezers). I'm leaving with great sadness but at the same time excited for the new challenge that lies ahead in this great club in a city that have always enchanted me. It's a new stage, new challenge and together we will go even further. Allez Paris!