What if we told you there was a new rule that would’ve completely changed the outcome of the 2020 Australian Open? Fast4 (experimental rules including first-to-four-game sets and no-ad scoring) has the ability to make tennis even more exciting to watch, and has the ability to radically change the way the sport is played. Do Sofia Kenin and Novak Djokovic keep their trophies? Or is there a secret champion waiting in the wings? This is Replay: a series where we look at the way numbers have shaped the game we love. -- Tennis Channel is the only 24-hour, television-based multimedia destination dedicated to both the professional sport and tennis lifestyle. A hybrid of comprehensive sports, health, fitness, pop culture, entertainment and travel programming, the network is home to every aspect of the wide-ranging, worldwide tennis community. It also has the most concentrated single-sport coverage in television, with telecast rights to the US Open, Wimbledon, Roland Garros (French Open), Australian Open, Emirates Airline US Open Series, ATP World Tour Masters 1000 events, top-tier WTA competitions, Davis Cup and Fed Cup by BNP Paribas, and Hopman Cup. Tennis Channel is carried by nine of the top 10 video providers. Subscribe: http://www.youtube.com/subscription_c... Watch live tennis and exclusive content at: https://tennischannel.com Read the latest tennis news at: https://www.tennis.com/ And what's happening off-the-court at Baseline: http://baseline.tennis.com/ Twitter: https://twitter.com/TennisChannel and https://twitter.com/Tennis Instagram: https://www.instagram.com/tennischannel/ Facebook: https://www.facebook.com/tennischannel/ and https://www.facebook.com/TennisMedia/