When you hit a massive forehand and the only thing left for a commentator to say is "😲!" Tonight @delpotrojuan will face Thiem in Acapulco in a rematch of their 5 set epic last summer in Flushing Meadows! 🎥: 2017 #USOpen R4. _ #tennis #instatennis #grandslam #delpotro #thiem #acapulco #rematch #forehand #delthortro