Laura Robson produced another scintillating display as she overcame former French Open champion Li Na to become the first British woman to reach the fourth round in 14 years.

The 18-year-old secured one of the biggest wins of her career in the second round when she defeated three-time US Open champion Lim Clijsters, but this victory ranks even higher.

Robson served well throughout the contest and was eventually able to secure a 6-4 6-7 (5-7) 6-2 in 2 hours and 25 minutes.

Laura Robson
Robson defeats Li Na in three sets [Reuters]

It was a mature performance from the teenager who has been on a high since winning a silver medal at the London Olympics when playing alongside Andy Murray.

Robson faces another incredibly difficult test in the last 32 when she faces reigning US Open champion Samantha Stosur of Australia.

"I don't know how I managed to pull that out as I was so disappointed after losing the second set," stated Robson after the match.

"I had a few break points early on and I wasted a couple with some average returning so when I got a chance again I knew I had to go for it."

Robson responded to losing the second set on a tie-break to become ever more aggressive with her returns and she was able to secure two breaks of serve to allow here to serve for the match.

Having served out without any problems Robson was asked whether this was the best form she had produced in her career.

"I've been injured loads in the past so this is the first time I'm injury free and fit and I think it has made a massive difference."