China's fifth-seeded Li Na breezed into the third round of the US Open - and a revenge rematch against Britain's Laura Robson - with a 6-2, 6-2 triumph over 100th-ranked Sofia Arvidsson of Sweden on Wednesday.

Li, the 2011 French Open champion, needed only 64 minutes to book a date with 30th seed Robson, who ousted Li in the third round last year at Flushing Meadows.

"I think both of us have improved a lot," Li said. "I'm really looking forward to playing against her. I would like to show her what I can do on the court and see how different we are.