NEW YORK (AP) -- A look at Tuesday's play at the $38.3 million U.S. Open tennis championships:
WEATHER: Mix of sun and clouds, humid and very warm. High of 91.
ATTENDANCE: Day: 24,224. Night: 22,864. Total: 47,088.
MEN'S RESULTS (Fourth Round): No. 2 Roger Federer defeated No. 17 Roberto Bautista Agut 6-4, 6-3, 6-2; No. 6 Tomas Berdych beat Dominic Thiem 6-1, 6-2, 6-4; No. 20 Gael Monfils beat No. 7 Grigor Dimitrov 7-5, 7-6 (6), 7-5; No. 14 Marin Cilic outlasted No. 26 Gilles Simon 5-7, 7-6 (3), 6-4, 3-6, 6-3.
TOP PLAYERS ON COURT WEDNESDAY (Quarterfinals): Men: No. 1 Novak Djokovic vs. No. 8 Andy Murray, No. 3 Stan Wawrinka vs. No. 10 Kei Nishikori; Women: No. 1 Serena Williams vs. No. 11 Flavia Pennetta, No. 16 Victoria Azarenka vs. No. 17 Ekaterina Makarova.
STAT OF THE DAY: 25-1 - Roger Federer's record in night matches at Arthur Ashe Stadium.
QUOTE OF THE DAY: ''It means I'm happy to be back in quarterfinal in a slam. That's it.'' - Gael Monfils, when asked what his victory over Grigor Dimitrov means to him.
WEDNESDAY ON TV (All Times EDT): Tennis Channel, 11 a.m.-7 p.m.; ESPN, Noon-6 p.m.; ESPN2, 6-11 p.m.
ON THIS DATE (Sept. 3, 1989): Chris Evert defeats 15-year-old Monica Seles in straight sets for her 101st, and final, U.S. Open singles victory.