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Keys had a lot to smile about after outlasting Riske in a first-round thriller.

A tale of two matches for Madison Keys.

The first one saw her stretched to the limit, playing until 1:48 a.m.—the latest finish for a women’s match at the U.S. Open.

Scratching and clawing her way out of a jam against Pittsburgh native Alison Riske, a resilient Keys pulled through 4-6, 7-6 (5), 6-2. Only two points from going home, she lived to fight another day.

She made up for that shaky performance with a dominant one in her next outing. In just 48 minutes, Keys overwhelmed another American, 16-year-old Kayla Day, 6-1, 6-1. Talk about a quick day at the office.

With all her power and natural ability, Keys, 21, is already a serious contender. While her game’s still a work in progress, she’s made it to at least the fourth round in each of the last five majors, not including her semifinal showing at last year’s Australian Open.

Keys should skate past 18-year-old Naomi Osaka in her next match, though she can’t afford to overlook the talented teenager, who’s capable of pulling off the upset.

Could a maiden Grand Slam final soon be up her sleeve?

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