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Nick Kyrgios sends Wimbledon crowd wild with underarm serve ace vs Rafael Nadal - Watch | Tennis | Sport | Express.co.uk
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This trio of women's tennis players uses underhand serves to their advantage | The Daily Pennsylvanian
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The underarm serve: Nick Kyrgios and Daniil Medvedev have refined the shot Michael Chang created | Tennis News | Sky Sports
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Federer defends Kyrgios for his underarm serve against Nadal - Tennis Tonic - News, Predictions, H2H, Live Scores, stats
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