New Haven, CT -- (Sports Network) - Third-seeded Frenchwoman Marion Bartoli, fourth-seeded Hungarian Agnes Szavay and former world No. 1 Amelie Mauresmo of France were all winners Tuesday at the $600,000 Pilot Pen Tennis event, a final hardcourt U.S. Open tune-up.

The 2007 Wimbledon runner-up Bartoli came from behind to beat Bulgarian Tsvetana Pironkova 2-6, 6-4, 7-5 in second-round action.

Szavay, meanwhile, staved off a late rally to beat Italian Sara Errani 6-4, 6-7 (3-7), 6-4 in a second-round match. Szavay was last year's Pilot Pen runner-up to Russian Svetlana Kuznetsova.

In first-round action, two-time Grand Slam champion Mauresmo, unseeded this week, edged out Estonian Kaia Kanepi 6-2, 6-7 (3-7), 6-2 at the Connecticut Tennis Center. The 2005 New Haven runner-up Mauresmo's second-round opponent will be fifth-seeded Swiss Patty Schnyder.

In some other first-round play on Day 3, sixth-seeded Italian Flavia Pennetta pasted Argentine Gisela Dulko 6-3, 6-1 and Romanian qualifier Monica Niculescu came back to beat Russian Maria Kirilenko 6-7 (7-9), 6-2, 6-1 on the grounds at Yale University.

This week's winner will collect $95,500. The top seed is Russian Anna Chakvetadze, who will meet Aussie Casey Dellacqua in the second round here on Wednesday.