Kaia Kanepi is the first qualifier in 36 years to reach the U.S. Open women’s quarterfinals.
The 32-year-old Estonian is ranked 418th after missing much of the past two years with problems in the soles of both feet and a virus known as a precursor to mononucleosis.
No one has advanced to the quarterfinals at Flushing Meadows with such a low ranking, although five women — including 2009 champion Kim Clijsters — did so while unranked entirely. That includes Barbara Gerken, who made it that far in 1981 as a qualifier.
Kanepi was able to get into the qualifying event by virtue of a protected ranking.
This is her sixth trip to a Grand Slam quarterfinal, but first since Wimbledon in 2013. She is 0-5 in that round previously.
CoCo Vandeweghe reached her first U.S. Open quarterfinal by beating Lucie Safarova 6-4, 7-6 (2).
The 20th-seeded Vandeweghe is into the round of eight at a Grand Slam tournament for the third time this season. She lost at that stage at Wimbledon in July, after making it to the semifinals at the Australian Open in July.
Vandeweghe is the third American woman into the quarterfinals at Flushing Meadows this year, joining Venus Williams and Sloane Stephens, who won their fourth-round matches a day earlier. Madison Keys could raise the total to four by winning her fourth-rounder later Monday.
Andrey Rublev beat No. 9 seed David Goffin 7-5, 7-6 (5), 6-3 to become, at 19, the youngest male U.S. Open quarterfinalist since Andy Roddick reached the round in 2001.
Rublev next faces top-seeded Rafael Nadal, who beat Alexandr Dolgopolov 6-2, 6-4, 6-1 earlier Monday.
The Russian Rublev entered the top 50 for first time in late July.
Rafael Nadal easily reached the U.S. Open quarterfinals, beating Alexandr Dolgopolov 6-2, 6-4, 6-1.
The No. 1 seed is back into the quarters in Flushing Meadows for the first time since 2013, when he won his second of two U.S. Open titles.
He broke serve six times and needed just 1 hour, 41 minutes to finish off his unseeded opponent and set up a matchup against either No. 9 seed David Goffin or unseeded Andrey Rublev.
Rafael Nadal is a set away from the U.S. Open quarterfinals.
The No. 1 seed leads Alexandr Dolgopolov 6-2, 6-4 after a little more than an hour in a fourth-round match.
Though Dolgopolov is unseeded, he had won two of the last three meetings with Nadal.
Top-seeded Rafael Nadal has taken the first set 6-2 from Alexandr Dolgopolov in their fourth-round match at Arthur Ashe Stadium.
Nadal is trying for his first U.S. Open quarterfinal appearance since winning the Grand Slam tournament in 2013.
Karolina Pliskova powered her way into the U.S. Open women’s quarterfinals, overwhelming American Jennifer Brady 6-1, 6-0 in just 47 minutes.
Two days after fighting off a match point to advance, the No. 1 seed won 22 of 24 points on her first serve and broke her unseeded opponent’s serve six times.
The U.S. Open runner-up last year, Pliskova advanced to face either No. 20 CoCo Vandeweghe or unseeded Lucie Safarova.
She raced to a 4-0 lead and never let Brady get into the match in a much better performance than Saturday, when she struggled past No. 27 Zhang Shuai 3-6, 7-5, 6-4.
Karolina Pliskova has won the first set 6-1 against American Jennifer Brady, a much better start for the women’s No. 1 seed than in her last match.
Pliskova raced to a 4-0 lead in the fourth-round match and closed the set in just 26 minutes after Brady double-faulted on set point.
Pliskova also played the first match on Arthur Ashe Stadium on Saturday. She dropped the first set and had to fight off a match point in the second before rallying to beat No. 27 Zhang Shuai 3-6, 7-5, 6-4.
Former champions Roger Federer, Rafael Nadal and Juan Martin del Potro try to reach the U.S. Open quarterfinals, while top-seeded Karolina Pliskova and No. 4 Elina Svitolina face American opponents in women’s fourth-round matches.
Federer brings an 11-0 record against No. 33 seed Philipp Kohlschreiber into their night matchup. The top-seeded Nadal faces Alexandr Dolgopolov on Monday afternoon.
The No. 24 seed del Potro faces sixth-seeded Dominic Thiem, with the winner getting Federer if the five-time champion can improve his 31-1 record in night matches at Arthur Ashe Stadium.
Pliskova opens the Labor Day schedule against unseeded Jennifer Brady. Svitolina meets No. 15 seed Madison Keys in the nightcap.
Keys, Brady and No. 20 seed CoCo Vandeweghe are trying to join fellow Americans Venus Williams and Sloane Stephens into the women’s quarters.