Wimbledon's Laura Robson has vowed to keep working hard at her tennis and force her way into the top 50 of the world rankings.

The 18-year-old's first appearance in a WTA singles final at the Guangzhou Open in China at the weekend ended in defeat, but she has moved into the top 70 for the first time.

After winning Olympic silver with Andy Murray in the mixed doubles, Robson also reached the last 16 of the US Open, beating the former world number one Kim Clijsters on the way.

Robson, who returns to action in the China Open in Beijing this weekend, said: "With a few more good wins I should be in the top 50 so I've got to keep working hard.

"I think I'm playing pretty well, I feel confident at the moment even though I lost.

"I've got qualifiers in Beijing, and it's going to be tough there as it is one of the top tournaments of the year."

Robson, who was aiming to become the first British women since 1988 to win a WTA singles final, lost the Guangzhou Open in three sets (6-3 5-7 5-4) to Su-Wei Hsieh.

She added: "It will be good to get a few more days of practice in before Beijing, work on the things that didn't go to plan in the final in Guangzhou and hopefully I can do well."