Wild US Open moment: King Novak needed a practice partner before his big quarter-final with Fritz, so Sky Sports’ Ryan Harrison—normally behind the mic—got the call. Harrison had to scramble for gear from lost and found just to hit with the 24-time Slam champ! With Fritz tipped as a dark horse, this rivalry is heating up. Can Novak’s unique prep help him keep his New York run alive? #Sports #Tennis #USOpen