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Is an underarm serve really that effective for Nick Kyrgios? Maths professor finally reveals the truth - Tennishead
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Wimbledon 2019: Kyrgios vs. Nadal and the Difference Between an Entertainer and a Champion | The New Yorker
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Rafael Nadal reveals what he really thinks of Nick Kyrgios' underarm serve | Tennis | Sport | Express.co.uk
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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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Nick Kyrgios Surprises Rafael Nadal With Cheeky Underarm-Serve During Their Wimbledon 2019 Second Round Encounter (Watch Video) | 🎾 LatestLY
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Nick Kyrgios is a genius with his underarm serve. JUDY MURRAY - Tennis Tonic - News, Predictions, H2H, Live Scores, stats
Nick Kyrgios vs Rafael Nadal Acupulco Open, Aussie's underarm serve video | news.com.au — Australia's leading news site
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Wimbledon 2019: Watch Nick Kyrgios enrage Rafael Nadal with underarm serve during second-round match | The Independent | The Independent
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Wimbledon fans think Nick Kyrgios will do one thing to Rafael Nadal which he will hate | Tennis | Sport | Express.co.uk
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Nick Kyrgios admits trying to hit Rafa Nadal and says he won't apologise after Wimbledon barnstormer
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