Williams eventually lost her No. 1 ranking to the German and, for the first time since the 2013 Australian Open, entered a major event without the top seed in hand.

Serena also reached the semifinals at the 2015 U.S. Open, alongside 30-somethings Flavia Pennetta and Roberta Vinci. “Thirties is the new 10,” Williams said after her match.

Serena Williams of the US hits a return against Venus Williams of the US during the women’s singles final on day 13 of the Australian Open tennis tournament in Melbourne on January 28, 2017.

By defeating her sister Venus 6-4, 6-4 in the Australian Open final Saturday, Serena Williams won her 23rd Grand Slam title, breaking the Open era record she held with Steffi Graf.

Williams is 30-1 overall in 2015 and owns a 19-match Grand Slam winning streak, including championships at the US Open last September and Australian Open in January, raising her total to 19 major ...

Serena Williams is celebrating down under -- for the fifth time. The tennis great defeated Belgian star Justine Henin to win her fifth Australian Open title since 2003, adding one more piece of ...

BERLIN — It was an impressive enough sporting feat when Serena Williams won a record 23rd Grand Slam singles title at the 2017 Australian Open, beating her sister Venus in the final.