: Laura Robson of Great Britain returns a shot to Elena Vesnina of Russia during their Women's Singles First Round match on Day Two of the 2015 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2015 in the Flushing neighborhood o
British round-up: Laura Robson fell apart from 4-0 ahead in the final set to gift Elina Vesnina victory in the first round of the US Open.
In an erratic encounter, which saw the pendulum swing between both players, Robson went down 3-6 6-3 7-5 at Flushing Meadows.
The Brit has seen her ranking plummet to 618 after missing more than 16 months with a wrist injury, but although she looked physically capable in Tuesday’s encounter, her mental fragility was exposed again.
"Any loss is tough but that one especially because, I mean if we’re being honest, I should have won," Robson said. "That definitely makes it harder and makes me more determined to work harder for the next one.
"I didn’t feel overly nervous. I just took 5 per cent off all my shots and that was enough to let her back into the match. She wasn’t going to give up. That 5 per cent made all the difference and it didn’t work out."
Robson also threw away a commanding position against Christina McHale at the Connecticut Open last week.
Earlier, Jo Konta impressed in ousting American wildcard Louisa Chirico 6-3 6-0.
"It looks good on paper but I don't really treat this win any differently from the previous 13," Konta told BBC Sport.
"I'm really happy I was able to deal with things out there and take my opportunities."
Aljaz Bedene also progressed when opponent Ernests Gulbis retired. Badene was leading 3-6 6-4 3-0 at the time.