John Breech on Twitter: "The tennis challenge system is my favorite challenge system ever invented. Pretty sure tennis is the only sport where I root for challenges #WimbledonFinal #Wimbledon #Federer #Djokovic https://t.co/7AYRxa1j2u" /
What Are The Rules for Challenges In Tennis?
What is the tennis challenge system? - Quora
ATP Challenger Tour Prize Money on the Rise – Long Island Tennis Magazine
The ATP Challenger Tour returns to the Rafa Nadal Academy by Movistar