Before this year's U.S. Open, Johanna Konta had played in just eight Grand Slams. She had reached the second round only once, at the 2012 Open.

Konta has never won a WTA Tour title, but after Thursday's second-round win over No. 9 seed Garbine Muguruza, she has made her mark in the U.S. Open record book.

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At 3 hours, 22 minutes, she played the longest women's match in Open history. Konta won, 7-6 (4), 6-7 (4), 6-2.

"I noticed after the first set -- it was incredibly long, but then after I had a couple glances on the clock -- I'm like, 'Oh, OK, we have been here a while,'" Konta said. "It's difficult with sweating buckets."