Mike Bryan, left, and Bob Bryan celebrate after beating Daniel...

Mike Bryan, left, and Bob Bryan celebrate after beating Daniel Nestor and Vasek Pospisil, of Canada, in a doubles match at the 2013 U.S. Open. (Sept. 1, 2013) Credit: AP

ACE. Mike Bryan on his relationship with twin and doubles partner Bob as they go for a sweep of the Grand Slam tournaments: "He treats me with more respect when I'm playing well and making returns."

ACE. Bob Bryan on executing a good chest bump with his brother after a big point: "Definitely have to get a few steps to lift off to get enough height. And it does help that we're the same size" -- 6-4 -- "because if I'm chest-bumping you, I'm breaking your nose every time."

FAULT. Scattered storms are in the forecast Monday, and it will take at least three years (and five minutes, once it is completed) to close the Arthur Ashe Stadium roof.

By the numbers

1 American seeded among the 64 entrants in the Open junior girls competition. That player, No. 10 Louisa Chirico of upstate Harrison, won her first-round match over unseeded Brit Harriet Dart yesterday.

1 American seeded among the 64 entrants in the Open boys tournament. That player, No. 5 Stefan Kozlov of Pembroke Pines, Fla., lost to unseeded Austrian Lucas Miedler in straight sets.

38,120 Yesterday's day-session attendance (a record).

Furthermore

Forty-three years ago today, the tiebreaker was first used in Grand Slam tennis on the opening day of the 1970 U.S. Open. A total of 26 tiebreakers were played that day, with two matches settled by fifth-set tiebreakers.

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