NEW YORK (AP) The Latest on the U.S. Open (all times local):
5:25 p.m.
Novak Djokovic has won the first set of the U.S. Open final against Stan Wawrinka in a tiebreaker.
Djokovic dominated the tiebreaker 7-1 after some shaky moments earlier in the set. He wasted two set points against Wawrinka's serve while leading 5-2, then got broken when he tried to serve out the set in the next game, double-faulting on break point.
But in the tiebreaker, a backhand passing shot by Djokovic put him up 3-1, and he won the next four points to close out the set.
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4:40 p.m.
A moment of silence was observed at the U.S. Open to mark the 15th anniversary of the Sept. 11, 2001, attacks.
Broadway performer Norm Lewis, who was set to sing the national anthem in Arthur Ashe Stadium prior to the men's singles final between Novak Djokovic and Stan Wawrinka, asked the crowd to observe the moment ''in memory of those lost 15 years ago today.''
A huge American flag was unfurled over the court, presented by a Brooklyn-based U.S. Marine Corp battalion. Another gesture was painted on the middle of the court: 9/11/01.
Earlier, American Bethanie Mattek-Sands , who wore star-spangled socks and sweatbands while winning the doubles title with Lucie Safarova of the Czech Republic, choked up during her victory speech, saying, ''It's a special day today here for everybody in New York.''
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4:20 p.m.
Novak Djokovic and Stan Wawrinka are playing for the U.S. Open championship.
The top-ranked Djokovic is seeking his 13th major title. Wawrinka is looking for his third, but he beat Djokovic in last year's French Open final.
Overall, Djokovic is 4-2 against the third-seeded Wawrinka at the majors.
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4:15 p.m.
Sixteen-year-old Kayla Day has won the U.S. Open junior tournament, completing an American sweep of the girls' singles and doubles.
The No. 5-seeded Day defeated 13th-seeded Viktoria Kuzmova of Slovakia 6-3, 6-2 Sunday. Day, from Santa Barbara, California, earlier this year reached the semifinals of the Wimbledon juniors. She also won the national 18 championships that earned her a wild card into the Open's main draw, where she advanced past Madison Brengle before losing to No. 8-seeded Madison Keys.
In the girls' doubles final Saturday, the U.S. team of Jada Hart and Ena Shibahara defeated fellow Americans Day and Caroline Dolehide 4-6, 6-2, 13-11. In the boys' final, Juan Carlos Manuel Aguilar of Bolivia and Felipe Meligeni Rodrigues Alves of Brazil defeated the No. 3-seeded Canadian team of Felix Auger-Alliassime and Benjamin Sigouin, 6-3, 7-6 (4).
In the Open's American Collegiate Invitational tournament that ended Saturday, Thai-Son Kwiatkowski and Danielle Collins, both of Virginia, won the singles titles. Collins, a two-time NCAA singles champion, beat Michigan's Ronit Yurovsky, 6-2, 6-4, while Kwiatkowski beat Austin Smith, of Georgia, 6-2, 6-2.
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2:58 p.m.
Bethanie Mattek-Sands is the first American to win the U.S. Open women's doubles championship since Liezel Huber and Lisa Raymond in 2011.
No U.S. player had even reached the final since then, until Mattek-Sands and Lucie Safarova of the Czech Republic took the title Sunday.
During the final, which was played on the 15th anniversary of the 9/11 terrorist attacks, Mattek-Sands wore knee-high socks and a left wrist band with the same red-and-white-striped, star-spangled design she did while teaming with Jack Sock to win a gold medal in mixed doubles at the Rio Olympics last month.
During the trophy ceremony, Mattek-Sands choked up and her eyes filled with tears as she told the crowd: ''It's a special day today here for everybody in New York.''
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2:25 p.m.
Bethanie Mattek-Sands of the United States and Lucie Safarova of the Czech Republic won the U.S. Open women's doubles title for their third Grand Slam trophy as a pair, beating the top-seeded French team of Caroline Garcia and Kristina Mladenovic 2-6, 7-6 (5), 6-4 on Sunday.
Mattek-Sands and Safarova, who were seeded 12th, added this championship to those from the Australian Open and French Open in 2015.
They trailed by a set and a break on Sunday before coming all the way back. They broke for the first time in the match when Garcia served for the victory at 5-4 in the second set.
Mattek-Sands and Safarova broke Garcia again in the opening game of the third set.
