NEW YORK — The Latest on the U.S. Open tennis tournament (all times local):
Maria Sharapova held on to edge 39-year-old Patty Schnyder, the oldest female qualifier in Grand Slam history, in the U.S. Open's first round.
Sharapova let a big second-set lead slip away, then needed four match points to close out Schnyder 6-2, 7-6 (6).
This was their ninth career meeting, but first in 10 years. Schnyder initially retired in 2011, but is now back on tour.
Madison Keys eased into the second round of the U.S. Open with a 6-4, 6-4 victory over 71st-ranked Pauline Parmentier of France.
The 14th-seeded Keys was the runner-up to Sloane Stephens at Flushing Meadows in 2017.
That was the first career Grand Slam final for Keys, who was one of four American women in the semifinals last year at the U.S. Open.
Eugenie Bouchard has won a match at the U.S. Open for the first time since 2015, the year she withdrew from the tournament after a fall left her with a concussion.
Bouchard had to go through qualifying to reach the main draw and moved into the second round by beating Harmony Tan of France 6-3, 6-1.
Canada's Bouchard was the 2014 Wimbledon runner-up and reached No. 5 in the rankings. She's now 137th.
In February, she reached a settlement in her lawsuit against the U.S. Tennis Association about her 2015 slip on a floor in the trainers' room.
She lost in the U.S. Open's first round in 2016 and 2017.
Nick Kyrgios doesn't really do nuance, so when he was asked about some key break chances early in a first-round victory at the U.S. Open, he explained that he approaches every point the same.
"I just come up to the line," Kyrgios said, "and try to serve it as hard as I can."
It seemed to work on this night, anyway. The 30th-seeded Kyrgios hit 25 aces — and also had 14 double-faults — while beating Radu Albot 7-5, 2-6, 6-4, 6-2.
The Australian closed in on a matchup against Roger Federer in the third round.
First, Kyrgios will need to beat Pierre-Hugues Herbert, and Federer will need to get past Benoit Paire.
Roger Federer improved to 18-0 in first-round matches at the U.S. Open and took one step toward a potential quarterfinal showdown against Novak Djokovic.
Dressed from head to toe in a plum-colored outfit, the 20-time major champion delivered 14 aces and never was in any trouble during a 6-2, 6-2, 6-4 victory over 117th-ranked Yoshihito Nishioka of Japan at Arthur Ashe Stadium on Tuesday night.
Federer saved the first eight break points he faced before finally faltering by pushing a forehand long on the ninth, losing serve for the only time while trying to close out the match at 5-2 in the third set. By then, the match was 1 hour, 45 minutes old — and it would last another seven minutes.
The No. 2-seeded Federer is seeking his sixth title at the U.S. Open, but first in a decade.
He would face 13-time major champion Djokovic if each wins three more matches.
Young American Frances Tiafoe finally has his first U.S. Open win on his fourth try — and he eliminated a seeded player, to boot.
Tiafoe, a 20-year-old from Maryland, beat No. 29 Adrian Mannarino of France 6-1, 6-4, 4-6, 6-4 to get to the second round at Flushing Meadows.
The 44th-ranked Tiafoe had lost in the first round in New York in each of the past three years, including against Roger Federer in 2017.
He's enjoying a breakthrough season in many ways, including a run to the third round of a Grand Slam tournament for the first time at Wimbledon, his first ATP title at Delray Beach and reaching a career-high 38th in the rankings.
Twice a Grand Slam semifinalist, Johanna Konta can't seem to make any headway at the majors these days.
A 6-2, 6-2 loss to No. 6 seed Caroline Garcia in her opener at Flushing Meadows is Konta's fifth consecutive exit in the first or second round at a Slam.
Before that, Konta made the final four at the Australian Open in 2016 and Wimbledon last year, propelling her to No. 4 in the rankings. Now she's 46th.
"I don't think there's too much to really beat myself up over and analyze," Konta said. "I mean, that's just the way it is sometimes."
Novak Djokovic made a winning return to the U.S. Open, fighting through extreme heat that caused him to feel sick during his match to beat Marton Ducsovics in four sets.
Djokovic missed the U.S. Open last year because of an elbow injury and was playing his first match in Flushing Meadows since losing the 2016 final to Stan Wawrinka.
It was a tough one, until he dominated after players were allowed to leave the court for 10 minutes following the third and fourth sets. Once they returned, the No. 6 seed finished off a 6-3, 3-6, 6-4, 6-0 victory in 2 hours, 59 minutes.
CoCo Vandeweghe double-faulted 12 times and is gone in the first round of the U.S. Open a year after making it all the way to the semifinals.
The 24th-seeded American lost to Kirsten Flipkens of Belgium 6-3, 7-6 (3).
Vandeweghe made a total of 35 unforced errors, 16 more than Flipkens.
At the 2017 U.S. Open, Vandeweghe was one of four Americans in the semifinals.
Australian Open champion Caroline Wozniacki easily reached the U.S. Open's second round by beating 2011 titlist Sam Stosur 6-3, 6-2.
The No. 2 Wozniacki is the highest-seeded woman left in the field after No. 1 Simona Halep lost her opening match.
Wozniacki was the runner-up at Flushing Meadows in 2009 and 2014.
Facing dangerously high temperatures expected to last for more than a day, the U.S. Open has extended a heat rule to men that only exists in the women's tour.
The U.S. Tennis Association says its medical team recommended the immediate implementation of the heat policy for the men, who will be allowed a 10-minute break between the third and fourth sets.
Its statement says the tournament referee, along with the medical team, would continue to monitor conditions on site to determine when the extreme heat policy would no longer be in effect.
The WTA has a heat rule allowing women a break between the second and third sets. There is no such rule on the ATP Tour.
Temperatures were already in the mid-90s by the early afternoon and expected to stay there or above until late Wednesday.
The WTA's heat rule is in effect at the U.S. Open, allowing female players a break between the second and third sets.
Players left the court on Louis Armstrong Stadium, where No. 10 seed Jelena Ostapenko and Andrea Petkovic split the first two sets.
The heat rule allows for a 10-minute break if either player requests it. If both decline, play continues.
The ATP Tour does not have such a rule for the male players.
It was already 95 degrees (35 Celsius) when No. 24 seed Coco Vandeweghe took Court 17 for her match following No. 5 seed Petra Kvitova's victory. Kvitova and Yanina Wickmayer wore towels around their necks during changeovers to battle the heat.
Past champion Novak Djokovic returns to the U.S. Open, and No. 2 seeds Roger Federer and Caroline Wozniacki are in action on a sweltering second day at Flushing Meadows.
The No. 6-seeded Djokovic faces Marton Ducsovics in his first match at the U.S. Open since losing to Stan Wawrinka in the 2016 final. The Serbian missed last year because of an elbow injury but is one of the favorites after winning Wimbledon in July and beating Federer in the final at Cincinnati this month.
Djokovic could face a quarterfinal matchup with Federer, the five-time champion who meets Yoshihito Nishioka of Japan in a night match.
Wozniacki is already the highest-seeded woman remaining after top-ranked Simona Halep lost on Monday.
A heat advisory is in effect in New York through late Wednesday, with temperatures in the mid-90s and heat index values in excess of 100 degrees (38 Celsius).