Sony Ericsson brought Caroline Wozniacki together with badminton's No.1 doubles player Cai Yun.
After some tennis and badminton on the practice courts, the pair signed autographs for fans.
Cai Yun, a 31-year-old from China, rose to No.1 in badminton for men's doubles in June this year.
Li Na, a megastar in her home country of China, did a round of interviews, including with CNN.
Another one of China's tennis greats, Zheng Jie, signed autographs for fans at the Rolex booth.
Zheng Jie was the first Chinese to make a Grand Slam semifinal, doing so at Wimbledon in 2008.
Sabine Lisicki learned her name in Mandarin and did some interviews prior to the China Open.
At No.17 in the world, Sabine Lisicki is Germany's No.2 player, behind No.11 Andrea Petkovic.
Francesca Schiavone, Italy's highest-ranked player ever, interviewed by CCTV before the event.
Anastasia Pavlyuchenkova on her way to a meet and greet and special hit for Mercedes-Benz.
Caroline Wozniacki, the defending champion in Beijing, played games at the Sony Ericsson booth.
Laura Robson en route to a hit with a young Chinese player. Robson qualified for the main draw.
After a visit to the Jetstar booth, Angelique Kerber played Nintendo Wii tennis with a young fan.
The official opening ceremony of the National Tennis Stadium, the China Open's new center court.
Pete Sampras and Marat Safin played an exhibition on the brand new National Tennis Stadium.