Ex-Mayer coach Tobias Summerer - Missing fans problematic for Federer

Tobias Summerer was on the ATP tour with Florian Mayer as a coach for years, later with Philipp Kohlschreiber. Summerer is currently training Maximilian Marterer and Cedric-Marcel Stebe at the TennisBase in Oberhaching. A conversation about the medium-term future in tennis.