Why the tennis “serve clock” may be a waste of time - Kovalchik - 2018 - Significance - Wiley Online Library
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Why the tennis “serve clock” may be a waste of time - Kovalchik - 2018 - Significance - Wiley Online Library
Shot clock, warm-up clock to be implemented at 2018 US Open - Official Site of the 2022 US Open Tennis Championships - A USTA Event
U.S. Open will use a 25-second serve clock to speed up pace of play - The Washington Post
Serve (tennis) - Wikipedia
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Tennis Players Get Ready to Be Put on the Clock (Visibly) - The New York Times
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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
/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")