Venus Williams returned to the final four at Melbourne Park for the first time since 2003, after beating Anastasia Pavlyuchenkova in straight sets on Tuesday.
Maria Sharapova is back in the semifinals at Wimbledon for the first time in four years, but not without a little drama after a three-set battle against 47th-ranked Coco Vandeweghe.
Serena Williams outslugged fellow American Sloane Stephens to reach the quarterfinals of the French Open on Monday.
Serena Williams avenged her heaviest Grand Slam defeat with a comeback 2-6, 6-3, 6-2 win over Garbine Muguruza on Monday to reach the Australian Open quarterfinals.NR
The Williams sisters have advanced to the third round at the Australian Open, with top-ranked Serena fending off set points before going on a 10-game roll to beat Vera Zvonareva 7-5, 6-0, and Venus beating fellow American Lauren Davis in straight sets.
Maria Sharapova was knocked out of the Wuhan Open by Swiss qualifier Timea Bacsinszky 7-6 (3), 7-5 in the third round on Wednesday.