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/https://www.thestar.com/content/dam/thestar/sports/tennis/opinion/2018/08/24/the-serve-clock-could-be-tenniss-countdown-controversy/nadal2.jpg "The serve clock could be tennis's countdown controversy | The Star")
The serve clock could be tennis's countdown controversy | The Star
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US Open shot clock: What is it? Is there a punishment? What does Rafael Nadal think? | Tennis | Sport | Express.co.uk
Tennis Players Get Ready to Be Put on the Clock (Visibly) - The New York Times
An early look at the pros and cons of tennis' new serve clock
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SMT (SportsMEDIA Technology)
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Pace of play a hot-button tennis issue with the arrival of the 'serve clock'
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