NEW HAVEN: Top-seeded Svetlana Kuznetsova needed three sets on Monday to overcome China’s Zheng Jie 6-1, 6-7 (5), 6-4 in the first round of the Pilot Pen tennis tournament, the final warmup before the US Open.

Amelie Mauresmo overcame some sloppy serving to beat Ai Sugiyama of

Japan 6-4, 6-1 in her first-round match. Mauresmo looked rusty in the opening set with six double faults, and was broken three

times. But the Frenchwoman broke Sugiyama four times in that set, and twice more in the second set to improve her career record against Sugiyama to 11-0.

Meanwhile, it took the fifth-seeded Agnieszka Radwanska of Poland three sets to beat Italy’s Roberta Vinci 6-2, 2-6, 7-6 (5).

On the men’s side, former Australian Open finalist Marcos Baghdatis of Cyprus lost his first-round match to qualifier Frederico Gil of Portugal in straight sets 6-4, 6-3. Sixth-seed Sam Querrey led a trio of American men who advanced on Monday. Querrey outlasted Marc Gicquel of France 6-4, 6-7 (3), 6-3 in the second round match. Earlier, Kevin Kim beat Teimuraz Gabashvili of Russia 6-4, 5-7, 6-3, and Robert Kendrick ousted Frederik Nielsen of Denmark 6-3, 7-5.