Why did diego costa leave Chelsea?

I left Chelsea because the Kong Di Blues fans have been very kind to me. 10 10 On September 9, the Premier League 10 round, Chelsea beat Wolves 3-0. Former Chelsea player diego costa was interviewed after the game and talked about his Chelsea career. Costa told reporters: "I have never had any problems with Chelsea fans." The problem was the head coach (Kong Di). I brought Chelsea two Premier League titles, but he didn't value me. There is nothing I can do about it, so I can only choose to leave. Today's events show that I didn't leave because of the fans. " "This feeling is very special. I think I did a good job here and left a good memory. Chelsea fans have always been very kind to me, and the way they treat me has surprised me and made people very satisfied. " After Costa was replaced, the fans sang his name and stood up and applauded him. He also walked around the stadium after the game and gave high-fives to the fans.