Vitors always had extremely fast hands. His downfall in mixed martials arts was that he always got taken to the ground. He had some ground fighting skills but preferred to win Knockout, so got grounded and pounded by a lot of guys.

Hes still got fast hands, but used less straight punches than he did in MMA, even though his hooks dont seem to be that wide. He could be a decent boxer.... but his style needs a major overhaul. He still fights like a MMA arts fighter. He doesnt use a jab, hes too squared up and he should really be thinking about bringing more power to those shots from his legs. He'll get schooled by a lot of high skilled fighters that cant take a punch, use thier jabs, and time him for counters.

Perhaps he just needs time to adjust.