There is no way of knowing that. What we DO know is it knocked out Tabiti, and that means he has a GLASS JAW.
Some people seem to be having a hard time accepting this fact. I don't know how..... There's irrefutable evidence in my AV that Tabiti is packing china in his chin!
Povetkin's left hook barely crazed Takam's chin but laid him out cold. Sometimes shots just put your lights out.
Jeez man, you could almost HEAR the glass shattering when that punch grazed his fragile whiskers. Now, THAT'S a glass jaw, people!