Maximilian Marterer (*1995 /GER) - Leftie 1st service - long-axis pronation in the qualification match - 2017 US Open - Flushing Meadows - New York - USA - August 2017
Maximilian Marterer (*1995 /GER) - Leftie 1st service - long-axis pronation in the qualification match - 2017 US Open - Flushing Meadows - New York - USA - August 2017