Zolkin UD. Zolkin was 6'5" tall with a huge reach and decent skills. Mildenberger is much smaller. He wasn't going to win on the outside, and wasn't exactly an in-fighter or puncher.
As Mendoza mentions, Zolkin had the physical advantages. And yes his skill level was OK, but Mildenberger in his pomp was for a short period a legitmate top 10 fighter. Also Zolkin found a way to make Akinwande look good! As someone who sat through Akinwande/Nelson (the worse fight I ever saw), I cannot forgive the big Russian for that: Mildenberger by close decision.
