NEW YORK: The Latest on the U.S. Open tennis tournament (all times EDT):
Serena Williams has been pushed to a third set by Maria Sakkari in the fourth round of the U.S. Open.
Williams won the first set 6-3, but Sakkari took the second in a tiebreaker, converting her fifth set point when Williams missed a forehand.
Sakkari beat Williams in three sets less than two weeks ago in the Western & Southern Open.
Alex de Minaur has moved into his first Grand Slam quarterfinal by beating Vasek Pospisil 7-6 (6), 6-3, 6-2 at the U.S. Open.
The key to the match in Louis Armstrong Stadium on Monday was the opening-set tiebreaker. Pospisil held four set points at 6-2 but failed to convert any.
De Minaur took a half-dozen points in a row to take the set and was in control from there.
He is a 21-year-old from Australia who is seeded 21st at Flushing Meadows.
In the quarterfinals, de Minaur will face No. 2 seed Dominic Thiem or No. 15 Felix Auger-Aliassime.
Serena Williams has taken the first set of her U.S. Open fourth-round match against Maria Sakkari by a 6-3 score.
Serena Williams and Maria Sakkari are on court in Arthur Ashe Stadium to warm up for their fourth-round meeting at the U.S. Open.
It is a rematch of a contest Sakkari won less than two weeks ago at the Western & Southern Open, a hard-court tournament played this year at Flushing Meadows.
Williams owns six U.S. Open titles and 23 Grand Slam singles championships in all.
Sakkari, a 25-year-old from Greece, is trying to reach her first Grand Slam quarterfinal.
The winner will face Alize Cornet or Tsvetana Pironkova next.
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