Wimbledon champion Petra Kvitova set up a semifinal clash with defending champion Li Na after an emphatic 6-0, 6-4 win over Daniela Hantuchova at the Sydney International on Wednesday.

Earlier French Open champion and world No. 5 Li beat Czech Lucie Safarova 6-2, 7-6(3).

Jet-lag does Tsonga in

Meanwhile in Melbourne, Jo-Wilfried Tsonga paid the price for a flight halfway round the world on Wednesday as he lost his Kooyong Classic opener 6-4, 6-3 to Austria's Jurgen Melzer.

The results:

At Sydney (APIA International): Women Quarterfinals: Li Na bt Lucie Safarova 6-2, 7-6(3); Victoria Azarenka bt Marion Bartoli 7-5, 6-4; Petra Kvitova bt Daniela Hantuchova 6-0, 6-4.

Men: Second round: Bobby Reynolds bt John Isner 3-6, 6-4, 6-3; Denis Istomin bt Ryan Sweeting 6-2, 6-1; Juan Martin del Potro bt Lukasz Kubot 6-4, 6-2; Richard Gasquet bt Fabio Fognini 6-2, 6-1; Jarkko Nieminen bt Radek Stepanek 7-6(5), 5-7, 6-1; Marcos Baghdatis bt Matthew Ebden 3-6, 7-5, 7-6(3); Julien Benneteau bt Feliciano Lopez 6-3, 6-4; Alex Bogomolov Jr. bt Viktor Troicki 7-6(5), 6-4.

At Auckland (ATP Heineken Open): Second round: Alejandro Falla bt Potito Starace 7-6(3), 6-3; Philipp Kohlschreiber bt Ryan Harrison 4-6, 6-4, 6-3; Nicolas Almagro bt Santiago Giraldo 6-4, 6-2; Benoit Paire bt Juan Ignacio Chela 5-7, 6-2, 6-2; David Ferrer bt Lukas Rosol 6-4, 6-2; Olivier Rochus bt Thomaz Bellucci 7-6(6), 5-7, 7-6 (5).

At Hobart (WTA Moorilla International): Second round: Shahar Peer bt Sacha Jones 7-6(7), 6-4; Mona Barthel bt Anabel Medina Garrigues 6-1, 6-4; Jarmila Gajdosova bt Anastasia Rodionova 6-3, 1-6, 6-4.

At Melbourne (Kooyong Classic): Challenge round: Jurgen Melzer bt Jo-Wilfried Tsonga 6-4, 6-3; Bernard Tomic bt Tomas Berdych 4-6, 6-3, 6-4; Mardy Fish bt Milos Raonic 6-1, 6-2; Gael Monfils bt Andy Roddick 7-6(2), 7-6(3).

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