Hobart champion McCartney Kessler and Adelaide champion Madison Keys are among the players boosted in this week's edition of the PIF WTA Rankings.

Sixth seed Elena Rybakina is out of the Australian Open after being beaten by Madison Keys in the fourth round on Monday.

World number seven Zheng Qinwen will face Wang Xinyu in the first all-Chinese ... Serena and Venus Williams faced off in Miami in 2009, while Madison Keys and Sofia Kenin battled it out in the ...