He fought for 4 hours under 35° against a perfectly healthy Kohlschreiiber. They were tied when he got the injury.
He didn't celebrate a match he won because the rival retired when he was losing 6-3 6-0 4-1.
I don't blame him for being happy but that celebration wasn't really needed. I'm just saying I saw tards and haters bashing Djokovic for celebrating like that after a 5 setter where his opponent played the match of his life, saving virtual match points. This can't even compare to that