Anne Keothavong beats Laura Robson in Nottingham

Anne Keothavong

Anne Keothavong won an all-British encounter against Laura Robson at the Aegon Trophy in Nottingham.

The Londoner came through 6-4 6-3 to reach the last 16, where she will face Czech qualifier Kristyna Pliskova.

Robson, who reached the French Open first round, received treatment for a knee injury late in the first set and seemed to fade later in the match.

Keothavong broke Robson's serve to make it 3-1 in the second and the world number 81 held out to seal the win.

Earlier in the day, Heather Watson came through a tense first-round match against Melanie Oudin 4-6 6-1 7-6 (7-5) after play had resumed from Tuesday with the Briton leading 5-4 in the third.

The 20-year-old from Guernsey failed to convert seven match points before sealing the third set tie-break 7-5, and the match ended in controversial circumstances with American Oudin furious at a line call on Watson's winning second serve.

Oudin, who defeated former world number one Jelena Jankovic at Wimbledon in 2009,external-link refused to shake hands with the umpire and only belatedly congratulated Watson on the victory.

Watson was back on court later in the day and was trailing Su-Wei Hsieh of Taipei 1-0 when rain ended play for the day in mid-afternoon.

When the rain came Jamie Baker was defying his world ranking of 207 to lead fellow Briton James Ward, ranked 65 places higher, 6-2 2-1, while Josh Goodall was a set down 7-6 (7-2) to Russian Igor Kunitsyn.

All three matches will resume on Thursday, with play due to get under way at 11:00 BTS.