LISBON, May 7 - Zheng Jie won out in the WTA Tour's first all-Chinese singles final at the Estoril Open on Sunday.

Na Li (L) of China shakes hands with her compatriot Jie Zheng (R) while being assisted by a doctor at the end of the final match at the Estoril Open tennis tournament in Lisbon May 7, 2006. Jie Zheng won the tournament by the withdrawal of Na Li due to leg injury. [Reuters]

The sixth seed Zheng took the title when her opponent Li Na pulled out before the start of the third set with cramp in her right leg.

Li, the eighth seed and last year's losing finalist, had won the first set 7-6 and Zheng took the second 7-5 on the clay surface.

The win was Zheng's second singles title on the Tour.

"I feel so good," Zheng said. "I feel so sorry for Li Na but it was a good match today and I look forward to Roland Garros." The Paris venue hosts the French Open from May 29.

Top seed David Nalbandian of Argentina beat Russia's Nikolay Davydenko to take the men's singles title

Nalbandian, the world number four, beat second-seeded Davydenko 6-3 6-4 at a windy National Stadium to take his second Estoril title after victory in 2002.

The win over Davydenko, the world number six, gave Nalbandian a three-to-two career advantage in head-to-head matches.