WBA light heavyweight champion Dmitry Bivol feels that a 36-year old Sergey Kovalev was just too tired to go on against Canelo Alvarez. “If Kovalev would have met the same Alvarez four years ago – everything could have been different,” Bivol said in an interview with tass. “Now it was clear that Sergey was fatigued. He boxed not that long ago, and he’s not the same as he…