Laura Robson out of Pacific Open

Great Britain's Laura Robson has been knocked out of the Pacific Open in Tokyo by Ana Ivanovic.

Former world number one Ivanovic claimed the second round victory 7-5 6-4.

Robson led the second set 3-0 but was subsequently broken by the Serbian, who went on to record a comfortable victory in one hour 27 minutes.

"You win some, you lose some," Robson said on Twitter after the match.

Robson, 17, recently reached the second round of the US Open at Flushing Meadows.