Yep, that ship has sailed. He made an extremely stupid decision. He was one of the best strikers in the world that season. The team had just played a CL final and would certainly fight for it again next season. He was loved by everyone and Italy, by his own words, was his second home.
Then he decides to go back to fucking shithole Argentina to play mediocre football for... Passion? Fuck off, Tevez. You wanted retirement, you got it.