Martina Hingis won both her Women's Singles and Mixed Doubles matches to help Hyderabad Aces beat Chennai Warriors 25-19 Champions Tennis League.
Heather Watson has shown she can mix it with the best, while Rafael Nadal continues his slump on grass and can Jelena Jankovic finally win a Grand Slam?
Five-time champion Serena Williams came from a set down to beat unseeded Heather Watson of Great Britain 6-2, 4-6, 7-5 in the third round.
Heather Watson defeated Daniela Hantuchova in the second round but the victory was overshadowed by her recent revelation that she has been sent numerous sick taunts to her Twitter account, including several death threats.
In a sport where perfection is unattainable - eventually you will miss - the game's earliest practitioners must have felt compelled to utter an oath or two, perhaps on day one.
Top-ranked Briton and world number 49 Heather Watson downed American qualifier Madison Brengle 6-3, 6-4 in 89 minutes and completed the tournament without dropping a set.
Poland defeated Great Britain 2-1 to stay on course for their second successive Hopman Cup final.
Monica Puig, seeded eighth in the event and ranked 48th in the world, outlasted 92nd-placed Watson 6-4, 6-4 in 94 minutes.
Sania and Huber will now fight it out with Romania's Monica Niculescu and Czech Republic's Klara Zakopalova for a place in the semifinals.
Laura Robson was sent packing Monday by former world number one Caroline Wozniacki and Elena Baltacha won just three games Tuesday in losing to New Zealand's Marina Erakovic.