NEW YORK - China's Li Na recovered from a mid-match lapse on Wednesday to beat Australian Casey Dellacqua 6-4 6-4 and reach the third round of the US Open.

The ninth seed, who has never been past the quarterfinals in New York, recovered from 4-0 down in the second set to reach the last 32.

Former French Open champion Li edged the first set but Dellacqua, a left-hander ranked 92nd in the world, blasted a series of winners to move clear in the second.

But Li recovered her poise in time to reel off six straight games and set up a clash with British teenager Laura Robson who eliminated three-time champion Kim Clijsters of Belgium.

Li Na of China serves to Casey Dellacqua of Australia during their women's singles match at the US Open tennis tournament in New York, Aug 29, 2012. [Photo/Agencies]

Li Na of China hits a return to Casey Dellacqua of Australia during their women's singles match at the US Open tennis tournament in New York, Aug 29, 2012. [Photo/Agencies]