Once again, John Isner's trip to Flushing Meadows ended in the third round. Once again, it happened with a loss to Germany's Philipp Kohlschreiber at that stage.
Wimbledon runner-up Eugenie Bouchard edged 30th-seeded Barbora Zahlavova Strycova in three sets to reach the US Open's fourth round for the first time.
Feisty Philipp Kohlschreiber ends Isner's, American men's hopes at US Open
Swiss teenager Belinda Bencic wrapped up a day of surprises at the US Open, ousting Jelena Jankovic to reach the first Grand Slam quarterfinal of her young career.
Caroline Wozniacki, who reached her first Grand Slam final at the US Open in 2009, lit up the New York crowds on Sunday with an electric win over Maria Sharapova.
She had been to the fourth round of Grand Slams five times before and never went further - but it was sixth time lucky for China's Peng Shuai in New York on Sunday.
Sara Errani ended Mirjana Lucic-Baroni's fairytale run at the US Open with a 6-3, 2-6, 6-0 win on Sunday.
Marion Bartoli, who made a fairytale run to the Wimbledon title a year ago, will join Martina Navratilova and Tracy Austin at the WTA Legends Event in Singapore.
The string of upsets during the first week of the US Open has intensified the competition for places at the BNP Paribas WTA Finals Singapore presented by SC Global.
Serena and Venus Williams strolled past Garbiñe Muguruza and Carla Suárez Navarro on Sunday afternoon and into the quarterfinals of the US Open doubles.
WTA Rising Star Jana Cepelova leads a strong field at the second WTA 125K Series event of the year in Suzhou, China. Watch free live streaming every day right here on wtatennis.com!
Maria Sharapova, who earlier this year won her fifth Grand Slam title at Roland Garros, is featured in the latest edition of The Edit. See images from the magazine feature right here.
Throughout the US Open fortnight, wtatennis.com contributors will bring us a little closer to the action. Today, Nick McCarvel takes a glimpse into Mirjana Lucic-Baroni's comeback...
Can anyone take No.1 from Serena Williams? Could No.2 change hands? Who can qualify for Singapore? Who saved match points in Week 1? Get ready for Week 2 here!
An interview with Maria Sharapova after her loss in the fourth round of the US Open.
A day after beating Venus Williams in singles at the US Open, Sara Errani and her partner, Roberta Vinci, were knocked out in the second round as the top-seeded team in women's doubles.
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We're only on Day 6 at the US Open, but five of the eight seeds already are gone. We rewind the weak week for the fallen favorites.