The stars of the WTA - including Agnieszka Radwanska - have been showing off their very best this week.
Sabine Lisicki is the second-fastest server of 2013 and fifth-fastest server of all time on the WTA.
Serena Williams is one of the few who can one-up her - fastest of 2013, second-fastest of all time.
It takes a strong returner to counter that kind of heat, and Maria Kirilenko definitely fits the bill.
Arguably the tour's strongest returner is Victoria Azarenka, ranked No.2 in the world after Williams.
Elina Svitolina recently became the first teenager to win a WTA title since Timea Babos last February.
One shot that's still going strong among the very best players in the world is the volley...
Serena Williams and Sara Errani are the last two women to sweep singles and doubles at the same event.
They both did it twice in 2012 - and Ana Ivanovic has been working on her net game recently as well.
Ivanovic and Polona Hercog duked it out in the second round of the China Open earlier this week...
Ivanovic played at a high level and won a lot of the battles - but the war would go Hercog's way...
Hercog would take out Ivanovic in straight sets before falling to Radwanska in the third round.
Svetlana Kuznetsova also put in a good showing but was just edged by former World No.9 Andrea Petkovic.
Dominika Cibulkova, who recently captured the Premier-level title in Stanford, fell to Madison Keys.
The Williams sisters are among the all-time best teams in the doubles discipline - but not this time.
The 13-time Grand Slam champions were edged in a thriller by Chan Hao-Ching and Liezel Huber.
Chan and Huber admired the final result afterwards - they did save match points to win, after all.
Jelena Jankovic gave a warm handshake after dropping a 60 60 decision on Carla Suárez Navarro.
Peng Shuai may have lost her footing but she has certainly risen back up with a great doubles run.
The fist pump is the most popular celebration after winning a point - Errani has mastered the gesture.