British number one Laura Robson has admitted that she is expecting a tough match when she faces Li Na in the third round of the US Open.
Following her victory, Robson is anticipating a difficult match against the 31-year-old Chinese player.
"It's definitely going to be a really tough match [against Li]," Robson told Sky Sports News. "She's playing super well at the moment. I watched a bit of her match this morning and I thought she played really well.
"I'll have a talk with [coach] Miles [Maclagan] tonight and see what we can do."
Robson beat Li at the US Open in 2012.