Wilder's sparring partner: 'He knocks people out in training'

"He knocks people out in training. They have a hard time during sparring. He boxes aggressively and hits very powerfully. There's still a killer inside him. When he hits you, it's a completely different power. I've trained with Fury and Joshua, the best of the best. Wilder, he's like a flash. It's a different kind of danger. You have to be very careful because his right hand can put you down at any moment. In the first training session, I didn't expect that kind of power. I missed two right punches and found myself in the dark for a few seconds. I have never experienced anything like that before," talkSport quoted Smakic as saying.