One of the most unusual sets of tennis EVER. Mackenzie McDonald is suffering from a shoulder injury and starts serving underhand at 4-4 in the first set (Knoxville challenger 2016). He's still producing some great shots in the rallies. Peter Polansky had no idea how to handle it therefore he recieved a great "mocking" after the match by tennis fans and media pundits. Polansky eventually found a way to win the match 6-7(8) 6-4 5-1 and McDonald retiring. Polansky, who had beaten Daniel Evans in the previous round, shines with some good victories over Juan Monaco, Jerzy Janowicz, Vasek Pospisil, the Zverev brothers (Mischa and Alexander), Thanassi Kokkinakis, Borna Coric etc.