He returned to London to train with the team in December and was approached about the possibility of returning to Stamford Bridge on a short-term contract.
"I spent eight years at Chelsea and it's always nice to go back to train," he told the Daily Mail. "London is my home and so is Chelsea. I had options in December, but Galatasaray was the most exciting and the most risky in terms of the challenge.
"We spoke with Chelsea about coming back, but the idea was not explored enough. I want to thank the Chelsea fans because they haven't forgotten me. They followed me in China and also during this Champions League campaign. I have heard so many times that I was done so I joined Galatasaray to show I can still play at the highest level."