Li says Serena 'untouchable'

Chinese legend predicts Williams will keep winning

Retired two-time Grand Slam champion Li Na believes Serena Williams will be untouchable at the Australian Open and does not expect her to quit even if she surpasses Margaret Court's record 24 Grand Slam titles.

Williams is gunning to equal Steffi Graf's Open-era record of 22 Slams in Melbourne, but has been battling fitness concerns early in the season.