While Victoria Azarenka pulled out with a right shoulder injury, Daniela Hantuchova withdrew due to illness.

Ana Ivanovic five routinely broke Daniela Hantuchova's serve in a 6-0 match that was over in a whirlwind 15 minutes, as the International Premier Tennis League got underway in Manila.

The world number five overcame a late surge from her opponent Daniela Hantuchova to register a 6-0, 6-4 victory.

Czech public radio and television reported that the players are mostly from lower divisions but that some are from the top Czech league.

Hantuchova, a 2008 Australian Open semi-finalist in her best Grand Slam run, has matched her best US Open showing from 2002 by reaching the final eight.

17-year-old qualifier Victoria Duval, a daughter of Haitian parents and ranked at 296, beat the 11th seed and 2011 champion 5-7, 6-4, 6-4.

Radwanska was joined in the quarter-finals by younger sister Urszula, who stunned sixth-seeded Serbian Jelena Jankovic 6-2, 4-6, 6-3

Hingis consistently showed the deft hands that made her a nine-time Grand Slam doubles champion. The 32-year-old is scheduled to play doubles with Hantuchova in four tournaments, including the U.S. Open.

Hingis, who won five Grand Slam singles titles and nine in doubles and was ranked number one in the world for a total of 209 weeks, says she didn't think she had the appetite for the training that would be necessary.

Slovakia's Hantuchova, who needed just 47 minutes to dispatch Paszek, set up a second-round clash with second-seeded Agnieszka Radwanska.