Reilly Opelka vs Sergiy Stakhovsky prediction

I had personally Opelka ML last night @3.00. I couldn't find time to post it, odds are now shifting. So, I will be going set handicaps here. Opelka or American ''new Isner'' finally takes part at Main Level. He had an amazing week against Big Kevin, Young and lost to Isner 2-1. He hits really fast ground strokes and has big serve. Opelka had %92 serve hold last week which is brilliant. Sergiy is typically grass and indoor player. He can rely on his serve + volley game style. He is not at his best level. He has lost last 11 of 14 games on hard surface. Sergiy holds his serve only %74. He is only better at breaks which is the only drawback here.