Serena & Venus Williams on US Open: "We Want to Try and Win to Keep the Cup in the U.S."

Serena and Venus Williams are not just in New York to have fun; they're here to win. While promoting their new cover of Hamptons magazine at a bash sponsored by Grey Goose in NYC, the girls opened up to OK! about the US Open, being in New York and even the Kardashian wedding!

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Serena told OK! that the best part about being in NYC is "the competition! We want to try and win to keep the cup in the U.S."

Venus agreed, but said that her favorite thing about New York is by far the food: "All the different food choices — you can just kind of keep eating!"

Venus also said to expect lace in one of her on-court ensembles during this year's championship.

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Although Venus was working, Serena got to attend her famous friend Kim Kardashian's wedding on Aug. 20.

"It was fun; it was amazing," Serena revealed. The best part? "Just looking at her being happy. That makes me happy." Friend La La Anthony told Access Hollywood recently that she and Serena spent the whole night dancing!

Expect to see lots of Venus and Serena the next few weeks; the US Open officially starts today! Serena is also the favorite to win the whole thing.

To see more of the girls' Hamptons spread, check out hamptons-magazine.com!