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John Isner believes in his chances against Rafael Nadal in the second round of the Italian Open.
Daniil Medvedev never gave Andy Murray a chance.
Olympic gold medalist Alexander Zverev advanced to the third round at the Australian Open and continued a streak at Grand Slam tournaments by beating Australian veteran John Millman 6-4, 6-4, 6-0.
Serena Williams is out of Wimbledon after she stopped playing her first-round match because of a right leg injury.