Hard-hitting top seed Jo-Wilfried Tsonga showed no mercy yesterday as he demolished home hope Zhang Ze 6-3, 6-4 to march into the quarter-finals of the China Open in Beijing.

Two good: Denmark's Caroline Wozniackli and Frenchman
Jo-Wilfried Tsonga during their respective China Open
pre-quarter-final matches

The Frenchman, who won his sixth career title last month in Metz, will next face former world number one Juan Carlos Ferrero of Spain, who saw off compatriot Marcel Granollers 6-4, 6-4.

Tsonga, the world number seven, won in 76 minutes, firing eight aces and breaking his opponent's serve three times as the gap in experience and quality showed. Tsonga. said: "On paper I was better than him, but on the court it's different. It was not easy today and I'm happy to win, even if I was supposed to."

Meanwhile, in the women's draw too the top seed, Caroline Wozniacki registered a routine pre-quarter-final win over Kaia Kanepi of Estonia, 6-3, 7-6 (7/3). But, there was disappointment for second seed Victoria Azarenka, forced to pull out with a foot injury againstĀ  Russian Anastasia Pavlyuchenkova.