Heather Watson has admitted that she is "disappointed" by her first-round exit at the US Open.
The British number one fell to a straight-sets defeat at the hands of Sorana Cirstea earlier today to fall at the first hurdle of the showpiece competition for the fourth year in a row.
"I couldn't find my serve, I'm not quite sure why, but I've got to look back and improve on that," Watson is quoted as saying by BBC Sport.
"It's disappointing leaving after a first-round loss here, especially after my year and the confidence I've gained. But it's just another week, and I'm going to have a lot more weeks."
Cirstea will face either Eugenie Bouchard or Olga Govortsova in the next round.
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