Opelka R. vs Giraldo S. prediction

ATP - SINGLES: US Open (USA) - Preliminary phase lasts - Semifinals Party for the previous phase of the US Open, the young American Opelka and Colombian Santiago Giraldo face. I'll go this time because the local Reilly continues to demonstrate a good level and wants to play his first Grand Slam. Giraldo is an irregular player so if Opelka maintains its powerful service, I believe will be the key to the match as the young American can also play well the rest. Let's trust Reilly, a player who has a great future and little by little it is demonstrating. I reilly this year already has met with top players, which has made them good games, this case Isner in the semifinals of Atlanta and Tsonga few days ago in Cincinnati where the French to defeat the young Opelka need 2 tie break.