Laura Robson knocked out of Copenhagen Open by Jankovic

Laura Robson in action

British number four Laura Robson has been knocked out of the Copenhagen Open in the first round by world number 20 Jelena Jankovic.

Robson broke her Serbian opponent five times in the match but still succumbed 6-4 7-6 (10-8).

The 18-year-old hit 48 unforced errors while third-seed Jankovic struck 31.

Fellow Briton Anne Keothavong, who beat Melinda Czink 4-6 6-2 6-3 in the first round, will face second seed Angelique Kerber of Germany on Wednesday.