NEW YORK (AP) — LOOKAHEAD TO TUESDAY

Both No. 5 seeds headline the first day of quarterfinal play at the U.S. Open. On the men's side, Casper Ruud of Norway plays No. 13 Matteo Berrettini of Italy at Arthur Ashe Stadium. Ruud is the French Open runner-up and Berrettini was runner-up at Wimbledon in 2021. Later in Ashe, Ons Jabeur of Tunisia plays unseeded Ajla Tomljanovic of Australia on the women's side. Tomljanovic is playing for the second time since she beat Serena Williams and sent her into an apparent retirement. At night, No. 12 seed Coco Gauff of the U.S. plays No. 17 Caroline Garcia of France and No. 23 Nick Kyrgios of Australia takes on No. 27 Karen Khachanov of Russia. Both night matches are at Arthur Ashe Stadium. Gauff is 4-0 in Ashe this year and is playing the Open quarterfinals for the first time in her career. The 18-year-old Gauff, the French Open runner-up in June, is the youngest American to make it this far at the U.S. Open since Melanie Oudin was 17 in 2009.

TUESDAY'S FORECAST

Rainy. High of 77 degrees Fahrenheit (25 Celsius).

MONDAY'S RESULTS

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Women's Fourth Round: No. 1 Iga Swiatek of Poland defeated Jule Niemeier of Germany 2-6, 6-4, 6-0; No. 8 Jessica Pegula of the U.S. beat No. 21 Petra Kvitova of the Czech Republic 6-3, 6-2; No. 22 Karolina Pliskova of the Czech Republic beat No. 26 Victoria Azarenka of Belarus, 7-5, 6-7 (5), 6-2.

Men's Fourth Round: No. 3 Carlos Alcaraz beat No. 15 Marin Cilic 6-4, 3-6, 6-4, 4-6, 6-3; No. 22 Frances Tiafoe of the U.S. beat No. 2 Rafael Nadal of Spain, 6-4, 4-6, 6-4, 6-3; No. 9 Andrey Rublev of Russia beat No. 7 Cameron Norrie of Britain 6-4, 6-4, 6-4; No. 11 Jannik Sinner of Italy beat Ilya Ivashka of Belarus 6-1, 5-7, 6-2, 4-6, 6-3.

STAT OF THE DAY

4 — The number of Grand Slam quarterfinals for Jannik Sinner this year.

QUOTE OF THE DAY

"Man, I was losing it in the locker room. Bro, I was going crazy. Yeah, I mean, that's my guy. So to see him post that, I was like, do I retweet it as soon as he sent it? I was like, You know what, I'm going to be cool and act like I didn't see it and then retweet it three hours later." — Frances Tiafoe, on receiving a Twitter shoutout for beating Rafael Nadal from LeBron James.

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