Fact file on 23-time Grand Slam singles champion Serena Williams, who announced on Wednesday she is expecting her first child:

SERENA WILLIAMS (USA)

World ranking: 2

Age: 35 (26/09/1981)

Career titles in total: 71

Career Grand Slam titles: 23 -- Australian Open: 2003, 2005, 2007, 2009, 2010, 2015, 2017; French Open: 2002, 2013, 2015; Wimbledon: 2002, 2003, 2009, 2010, 2012, 2015, 2016; US Open: 1999, 2002, 2008, 2012, 2013, 2014

Career prize money: $84,463,131

- Deposed by Angelique Kerber as world number one last year, Williams regained the top ranking with her Australian Open victory in January, although inactivity since then saw her drop back to No. 2.

- With her 23rd Grand Slam title she surpassed Germany's Steffi Graf for the most in the Open Era.

source: AFP