Following are facts and records ahead of the 139th edition of the U.S. Open, which begins on Monday. PRIZE MONEY Men’s/women’s singles winner: $3.85 million Men’s/women’s singles runner-up: $1.9 million Total prize pot: $57 million SHOWCOURTS Arthur Ashe Stadium Capacity: 23,771 The stadium is named after Arthur Ashe who won the men’s singles title at the inaugural U.S. Open in 1968, the Australian Open in 1970, and Wimbledon in 1975. Louis Armstrong Stadium Capacity: 14,053 It was opened during the 2018 U.S. Open to replace the 1978 stadium of the same name. It has a retractable roof, the largest of its kind among number two stadiums at Grand Slam venues. Grandstand Capacity: 8,125 The court made its debut on Aug. 29, 2016, the first day of the 2016 U.S. Open. TOP SEEDS Men’s singles 1-Novak Djokovic (Serbia) 2-Rafa Nadal (Spain) 3-Roger Federer (Switzerland) 4-Dominic Thiem (Austria) 5-Daniil Medvedev (Russia) 6-Alexander Zverev (Germany) 7-Kei Nishikori (Japan) 8-Stefanos Tsitsipas (Greece) Women’s singles 1-Naomi Osaka (Japan) 2-Ash Barty (Australia) 3-Karolina Pliskova (Czech Republic) 4-Simona Halep (Romania) 5-Elina Svitolina (Ukraine) 6-Petra Kvitova (Czech Republic) 7-Kiki Bertens (Netherlands) 8-Serena Williams (U.S.) MOST CHAMPIONSHIP TITLES Men’s singles Before 1968 7 – Bill Tilden (U.S.), William Larned (U.S.), Richard Sears (U.S.) Open Era 5 – Roger Federer (Switzerland), Pete Sampras (U.S.), Jimmy Connors (U.S.) Women’s singles Before 1968 8 – Molla Mallory (U.S.) Open Era 6 – Serena Williams (U.S.), Chris Evert (U.S.) YOUNGEST CHAMPION Men’s singles – Pete Sampras (U.S) (1990): Aged 19 years, 28 days Women’s singles – Tracy Austin (U.S) (1979): Aged 16 years, 8 months, 28 days OLDEST CHAMPION Men’s singles – William Larned (U.S.) (1911): Aged 38 years, 8 months, 3 days Women’s singles – Molla Mallory (U.S.) (1926): Aged 42 years, 5 months, 27 days SERVING RECORDS Most aces in a tournament (since 1991) Men’s singles 144 – Pete Sampras (U.S.) in 2002 Women’s singles 70 – Serena Williams (U.S.) in 1999.