British number one Laura Robson is through to the third round of Southern California Open after grinding out a 4-6 7-5 6-2 win over Ayumi Morita.
Robson, who continues to show signs of overall improvement after she made the last 16 of Wimbledon earlier this summer, battled back from a set down to eventually overcome her Japanese opponent.
The 19-year-old was initially on the back foot at Carlsbad but managed to level the match in the 12th game of the second set when Morita double-faulted.
Robson then broke Morita in the fourth game of the decider and, after leading 4-1, had few problems wrapping up the victory in two hours and 40 minutes.
Meanwhile, Coco Vandeweghe saw off fellow American Allie Kiick to make the second round, where she is joined by eighth seed Carla Suarez Navarro, who beat Sachie Ishizu.
Poland’s Urszula Radwanska and Kazakhstan qualifier Sesil Karatantcheva were also both winners on Tuesday to maintain their progress in California.
There was also good news for British number two Heather Watson, who marked her return to action with a win at the WTA Citi Open in Washington.
Playing for the first time since a first-round defeat at Wimbledon last month, Watson overturned a one-set deficit to beat qualifier Alexandra Mueller 6-7 (5-7) 6-4 6-3 in two hours and 10 minutes.
Watson has been plagued by illness and injury problems over the past 12 months but will hopefully put those woes behind her now as she concentrates on making a return to top form during the second half of 2013.
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