World number one Justine Henin made solid progress in blustery conditions at the Rogers Cup in Toronto on Thursday with victory over Shuai Peng.
Henin did not enjoy the windy conditions in Toronto
Henin, playing her first event since Wimbledon, won 7-5 6-2 and will face Nadia Petrova in the last eight.
"It was tough I can tell you," said Henin. "For players it was terrible conditions, it's tough especially when you don't have a lot of matches."
Henin next meets sixth seed Petrova, who beat Patty Schnyder 6-4 6-1.
"I don't want to look too far ahead, I'm still in preparation for the US Open and I don't want to forget that," Henin added. "I go match after match, a little mistake can be expensive.
"My next goal is my next quarter-final against Petrova. That is going to be tough enough."
Second seed Jelena Jankovic defeated Sybille Bammer 6-2 6-3 and will now meet Virginie Razzano, who upset 11th seed Shahar Peer 6-4 6-3.
China's Zi Yan followed up Wednesday's win over world number four Ana Ivanovic with a 6-3 5-7 7-6 (7-5) defeat of Eleni Daniilidou.
Third seed Svetlana Kuznetsova saw off Meghann Shaughnessy 6-3 6-2 to set up a quarter-final against 12th seed Tatiana Golovin, who beat Francesca Schiavone 6-2 6-0.