OK, having watched the first set I now consider myself an expert at tennis handicapping, at least to the point I know you can't possibly risk real money on the Shapovalov kid (Canadian money is still ok).
First off, he hits the ball out of bounds and into the net at an alarmingly high rate. In other words, he's not very good at tennis. I've believe this to be bad if you wagered on him.
Second, he wears a baseball cap backwards. This tells me he can't be taken seriously.
If you bet on the other guy go ahead and get in line to cash your ticket. They will likely make you wait until the match is over, but you can safely spend that money.