Former Tennis star Martina Navratilova has said Serena Williams can win 20-plus Grand Slams despite her flop show at the Australian Open.
Navratilova said "World number one" Williams is still well ahead of the competition, including the emerging generation of women's players, Sport24 reports.
Williams was gunning to match Navratilova and Chris Evert on 18 Grand Slams, but hampered by a back problem, she crashed out in the fourth round at Melbourne Park to Ana Ivanovic.
