Is an underarm serve really that effective for Nick Kyrgios? Maths professor finally reveals the truth - Tennishead
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Andy Murray's Mother is impressed with Kyrgios Arm Serve | Tennis Shot
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Nick Kyrgios underhand serves vs Rafael Nadal at Wimbledon (video) - Sports Illustrated
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2019: Year of the Underarm Serve - YouTube
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Nothing underhand about underarm serve, says Murray | Reuters
Tennis Is Opening Up to Underhand Serves - The New York Times
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Watch: Andy Murray pulls off rare underarm serve - and it very nearly backfires
Controversial underarm serve proves popular tactic at French Open
Nick Kyrgios sends Wimbledon crowd wild with underarm serve ace vs Rafael Nadal - Watch | Tennis | Sport | Express.co.uk
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
Nick Kyrgios's underarm serving a rebellious act with echoes of Lenglen | Tennis | The Guardian
/origin-imgresizer.eurosport.com/2022/01/18/3290926-67298788-2560-1440.jpg "It's a circus!' - Nick Kyrgios sends fans wild with underarm-tweener serve and showboats at Australian Open - Eurosport")