Former world number one Martina Navratilova has named Serena Williams’ main rival.

I think Serena Williams’ closest rival was Justine Henin. And, of course, her sister Venus. But Vinus was a bit unlucky, because she couldn’t overpower Kris Evert. There were a lot of eager players.

Victoria Azarenka could have competed with her, but she quickly ran out of steam. First she was injured, then she gave birth to her son. Victoria beat Serena at the US Open a couple of years ago, but that was it. So that leaves only Hénin and Vinus,” Tennis Up to Date quoted Navratilova as saying.