Controversial underarm serve proves popular tactic at French Open
Tennis skills: the underarm serve
Viewpoint: The Underhand Serve Tactic
Wimbledon 2022: Andy Murray uses underarm serve in first-round win | The Independent
Is the Underhand Tennis Serve a Good Tactic? - YouTube
Tennis Is Opening Up to Underhand Serves - The New York Times
Medvedev's 'smart' underarm serve helps wins crucial point v Zverev - YouTube
Nick Kyrgios's underarm serving a rebellious act with echoes of Lenglen | Tennis | The Guardian
Ruminating on the Underhand Serve – Michal's Musings
Nick Kyrgios Underarm Serve Compilation | "Nick Kyrgios and the underarm serve" One of tennis' most talked-about stories over the past year... | By Tennis TV | Facebook