Sam Stosur has crashed out of the US Open, losing in three sets to the unseeded Victoria Duval.
Stosur won the first set 7-5 and led 4-2 in the second set before her game fell apart.
Stosur lost 7-5, 4-6 4-6.
Earlier, Casey Dellacqua bowed out of the US Open in the opening round after losing to Croatian Ajla Tomlijanovic 6-3 1-6 4-6.
The Australian squandered a first set lead, going down in the second set under pressure from the Croatian’s strong forehand.
In the third set Dellacqua was broken in the first game and went on to lose the match to the 20-year-old who will now play 26th seed Alize Cornet of France in the second round.
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Dellacqua will be eyeing off a deeper tournament run in the doubles where she is paired with fellow Australian Ashleigh Barty.
The pair have blitzed their way through 2013, making it to the finals of the Australian Open and taking out a WTA title, Dellacqua’s second of the year.
In the mens draw, Roger Federer made a solid start to his bid for an 18th grand slam title, advancing to the second round of by defeating Slovenia’s Grega Zemlja 6-3 6-2 7-5 on Tuesday.
The 32-year-old Swiss star and seventh seed won a rain-delayed match from Monday night to book a last-64 meeting with Argentina’s Carlos Berlocq.
“I felt great,” Federer said. “Day session or night session, it doesn’t really matter when you play on Arthur Ashe Court.”
Federer, whose 56th grand slam start in a row matched Wayne Ferreira for the all-time record run, has only one title in his past 14 major starts – that coming last year at Wimbledon.
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After a second-round exit at Wimbledon this year, Federer needed only 93 minutes to eliminate Zemlja despite surrendering a third-set break.
“You’re going to have some hiccups like I had today. It was a minor one,” Federer said. “I might have had more confidence if I had closed it out without that. This way I had to fight a bit more. Who knows? Maybe that gives me confidence too.”
Federer, who won five US Open titles in a row from 2004-08, has not made the Flushing Meadows final since losing to Juan Martin del Potro in 2009.
This year, Federer is on a quarter-final collision course with second seed Rafael Nadal, whom he has never faced at the US Open.
World No.1 Novak Djokovic, a six-time grand slam champion, launches his quest for a fourth consecutive US Open final later on Tuesday against Lithuanian Ricardas Berankis.
