World number one Iga Swiatek was defeated by Czech teenager Linda Noskova in the third round of the Australian Open. Noskova's victory over...

he strength of her claim to be considered the greatest player ever is rooted not only in her longevity - and 23 Grand Slam singles titles -...

After surpassing Steffi Graf's record of 22 major titles in the post-1968 Open era, there's little else for Williams to achieve.

TENNIS-OPEN/SERENA-TITLES (FACTBOX):FACTBOX-Tennis-List of Serena Williams' 23 grand slam singles titles

TENNIS-OPEN/WOMEN-CHAMPIONS:Tennis-Australian Open women's singles champions

TENNIS-OPEN-VENUS:Factbox - Australian Open finalist Venus Williams

TENNIS-OPEN/VENUS (FACTBOX):FACTBOX-Tennis-Australian Open finalist Venus Williams

TENNIS-OPEN-KEYS:American Keys to miss Australian Open after wrist surgery

FOOTBALL-NFL/ROUNDUP:NFL-National Football League roundup

TENNIS-OPEN/KEYS:Tennis-American Keys to miss Australian Open after wrist surgery

TENNIS-WOMEN/FINALS-WINNERS (PIX, TV):Tennis-Winners of the WTA Finals

Lucie Safarova's powerful, sweeping lefty serve is lethal on grass, and she follows it up with a liquid whip of a forehand.