Seventh seed Justine Henin-Hardenne reached the U.S. Open third round on Thursday with a below par 6-3, 6-4 win over Spain's Maria Sanchez Lorenzo.

The French Open [ Images ] champion lost her opening service game before taking control against the world number 99 with some trademark backhand flourishes.

Henin-Hardenne seemed to be cruising when she led 4-1 in the second set but allowed Sanchez Lorenzo back into the match with numerous unforced errors before eventually finishing her off.

"I had little ups and downs but a lot of good things," said the Belgian. "I have to be more focused in my next match."

In round three the 2003 U.S. Open champion plays Cho Yoon-jeong of South Korea who upset Argentine 27th seed Gisela Dulko [ Images ] 6-4, 6-3.

Serbia and Montenegro's Jelena Jankovic [ Images ], Henin-Hardenne's possible fourth round opponent, also advanced with a 6-2, 6-0 thrashing of lanky 15-year-old American Alexa Glatch.

Women's second seed Lindsay Davenport [ Images ] seeks her place in the last 32 when she faces Pauline Parmentier of France [ Images ] later on Thursday.

An intriguing clash of styles is in store on Arthur Ashe Court later when 35-year-old American Andre Agassi [ Images ] pits his outstanding returns against the formidable serve of lofty Croatian Ivo Karlovic [ Images ].

French third seed Amelie Mauresmo [ Images ] will also need to be on her mettle against Bulgarian teenager Sesil Karatantcheva in the evening session.