Rafael Nadal's retirement from tennis serves as a reminder that for all of his Grand Slam titles and other successes, his greatest legacy might be the qualities that inspired Carlos Alcaraz, Iga Swiatek and other younger players.

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.