Kurbanov is a 97 KG who couldn't beat Sadulaev. Zare will mop him.
I think Javan absolutely can beat Uguev. Uguev, in my opinion, is 'just' an aged 57 KG guy. Problem is, he has the strength for 61 KG still and has retained the speed. He isn't big, though and is very good. If Javan can control the pace, similar to Blaze, he could win it.