Andy Murray defends use of cheeky underhand serve in Wimbledon opener against James Duckworth | CNN
Rafael Nadal to blame for underarm serve trend, says Nick Kyrgios - Tennishead
Nick Kyrgios sends Wimbledon crowd wild with underarm serve ace vs Rafael Nadal - Watch | Tennis | Sport | Express.co.uk
Novice Tennis Player Doing An Underhand Serve, Stock Video - Envato Elements
2019: Year of the Underarm Serve - YouTube
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
This trio of women's tennis players uses underhand serves to their advantage | The Daily Pennsylvanian
It's a circus!' - Nick Kyrgios sends fans wild with underarm-tweener serve and showboats at Australian Open - Eurosport
Tennis Is Opening Up to Underhand Serves - The New York Times
The Easiest, Riskiest, Most Controversial Shot in Tennis - WSJ
Nick Kyrgios underhand serves vs Rafael Nadal at Wimbledon (video) - Sports Illustrated
Fresh Takes: The infamous underhand serve
Nick Kyrgios's underarm serving a rebellious act with echoes of Lenglen | Tennis | The Guardian
Tennis skills: the underarm serve
How to Underhand Serve like Kyrgios (tennis lesson) - YouTube
Nadal furious after bad boy Kyrgios tries underarm serve in shock win over Spaniard | The Sun
French Open Underhand Serve Trending Thanks to Star Who Hates Tennis
Underhand Tennis Serve: Rules with Serving Underhand | USTA.com
Serve (tennis) - Wikipedia
Nothing underhand about underarm serve, says Murray | Reuters
Viewpoint: The Underhand Serve Tactic
Is an underarm serve really that effective for Nick Kyrgios? Maths professor finally reveals the truth - Tennishead