Bill Ackman Tennis Protege Tiafoe Has His Debut: The Open Today

U.S. Open at a Glance

Tuesday’s top matches: Men’s No. 2 seed Roger Federer, a five-time champion, and No. 3 Andy Murray face first-round opponents. Frances Tiafoe, 17, who received financial support from hedge-fund billionaire Bill Ackman as an amateur, makes his U.S. Open debut.

Serena Slam: Serena Williams, trying to become the first player to sweep all four Grand Slam events in one year since 1988, won the first eight games of her match Monday night against Vitalia Diatchenko and advanced to the second round when the Russian retired with a leg injury.

Americans: Jessica Pegula, whose parents own the NFL’s Buffalo Bills and the NHL’s Buffalo Sabres, won in her Grand Slam debut; Venus Williams, playing in her 17th U.S. Open, won in three sets; Coco Vandeweghe defeated Sloane Stephens in an all-American match; Mardy Fish, playing in his last U.S. Open, won in four sets.

Weather: Sunny and hot, with a high of 91 degrees (33 Celsius), forecast for Tuesday.

Money Matters: First-round losers, both men and women, earn $39,500 at the U.S. Open.

Stat of the Day: Serena Williams had six aces and lost a total of five points in winning the first eight games of her match.

Quote of the Day: -- “Today for me, when I come on court I know I can beat Nishikori. ... It’s not like if I play against Roger Federer.” -- Benoit Paire, after his five-set upset of No. 4 seed Kei Nishikori, a U.S. Open finalist in 2014.

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