"It's been an amazing year so far," said the 25-year-old Nishikori, who will move up to fourth from fifth in the world rankings. "I've had some good Grand Slams, too."
Williams had signalled her intention to retire in a Vogue article in early August, saying she was "evolving away from tennis" but never confirming the U.S. Open as her final event.
Former world number one Caroline Wozniacki eased into the semi-finals of the US Open on Tuesday with a ruthless 6-0, 6-2 win over wounded Latvian Anastasija Sevastova.
World number one Novak Djokovic and number two Rafa Nadal set up a mouth-watering men's singles final at the US Open with victories in the semi-finals at Flushing Meadows on Saturday.
A summary of Wednesday's action at the US Open.
'It was beautifully played by an American band.'
Serena Williams will be wary of another semi-final slip-up when she takes to the Arthur Ashe Stadium court on Thursday to face 10th seed Karolina Pliskova for a spot in the US Open final.
Entering their third Grand Slam final of the year, Leander Paes and Martina Hingis continued their golden run as mixed doubles pair as they beat Bethanie Mattek-Sands and Sam Querrey 6-4, 3-6, 10-7 to win the U.S. Open Mixed Doubles title at the Louis Armstrong stadium on Friday.
Bethanie Mattek-Sands of the US and Czech Lucie Safarova fought back from the brink of defeat to steal the US Open women's doubles title, 2-6, 7-6(5), 6-4 over the French top seed partnership of Caroline Garcia and Kristina Mladenovic on Sunday.
The German sixth seed, who has not won a title since winning at Flushing Meadows last year, never got into the match against the 2016 WTA newcomer of the year.
Chasing a sixth US Open title, Federer needed just one hour and 46 minutes under a closed roof at Arthur Ashe Stadium to put away the 31st seed Lopez, leaving plenty in the tank after being forced to go the distance in his opening two matches.
Dolgopolov, who advanced to the 2nd round of the US Open on Wednesday, said he could not remember ever being approached to fix a match.
World number one Novak Djokovic continued his rich vein of form as he brushed aside French opponent Jo-Wilfried Tsonga in straight sets to clinch the Shanghai Masters title on Sunday.
After a flawless first set from Mertens the tide turned in Andreescu's direction in the second when she fired a cross-court forehand winner to break the Belgian at love and take a 4-2 lead.
Prajnesh Gunneswaran got a taste of high-level tennis in his first-round exit from the US Open, losing to world number five Daniil Medvedev in 84 minutes, in New York, on Monday.
Fifth seed Simona Halep narrowly avoided a third-round upset with a 6-1, 2-6, 6-4 win over Hungary's Timea Babos on Saturday to keep her US Open title hopes alive.
Images from the US Open final played at Flushing Meadows on Sunday
IMAGES from the matches played at Miami Miasters in Key Biscayne, Florida, on Wednesday
A summary of Wednesday's action at the US Open.
IMAGES from Day 6 of the 2023 US Open on Saturday.
A summary of Wednesday's action at the US Open on Day 3.
IMAGES from Day 9 of the US Open matches played on Tuesday
New York City Police Commissioner William Bratton apologised on Thursday to former US tennis star James Blake, who was arrested after being wrongly identified as a suspect in a fraud ring and said he is concerned over how much force is used.
With Roger Federer and 2018 champion Novak Djokovic having already made exits, Nadal's path to a fourth US Open trophy has been cleared of familiar hurdles.
In the decider, Berrettini broke twice for a 4-2 lead but a rejuvenated Monfils dug deep and raced around the court to fight off three match points to force a final-set tiebreak. But it was Berrettini who leaned on his powerful serve to prevail and become the fourth Italian man to reach a Grand Slam semi-final in the Open Era.
Roger Federer returned from a month-long layoff with a 6-4, 6-4 second round victory over Roberto Bautista Agut on Tuesday at the Western and Southern Open in Cincinnati.
Five-times champion Roger Federer reached his first US Open final in six years as he raced past fellow Swiss Stan Wawrinka 6-4, 6-3, 6-1 at Flushing Meadows in the semi-finals on Friday.
Rediff.com presents the early surprises at the year's final Grand Slam
'He probably deserves a player that is probably more dedicated to the game than I am. He deserves a better athlete than me'
However, the 30-year-old Russia belied her own self-doubt with an impressive three-set win over the Romanian to thrust the former world number one back into the spotlight as the toast of the Big Apple.
India-Pakistan peace seem like a pipe dream but it does turn into a reality at sporting events like the ongoing Asian Games
Andy Murray made another of his trademark stirring fightbacks as the third-seeded Scot powered past Frenchman Adrian Mannarino after dropping the first two sets of their second round encounter at a sweltering US Open in New York, on Thursday.
The upset left only three of the top 10 seeds still alive in the year's final Grand Slam - number one Serena Williams, who is seeking the fourth women's calendar-year Grand Slam, second seed Simona Halep and fifth seed Petra Kvitova.
IMAGES from the US Open matches played on Day 1 at the Flushing Meadows in New York on Monday.
Pierre Paganini may be the most important reason Roger has the best record in men's tennis in the past 12 months.
Rafael Nadal is one victory away from returning to the top of the world rankings after surviving a huge scare to beat Italian Fabio Fognini in the quarter-finals of the China Open on Friday.
Overpowers Svitolina to reach second straight US Open final
Marin Cilic and Milos Raonic booked their spots in the Paris Masters second round on Monday, while Roger Federer pulled out of the tournament with next month's ATP Finals on the horizon.
The final will pit power against power when Andreescu takes on her childhood hero Williams, who claimed her first US Open title in 1999 before Andreescu was even born.
Japan's Kei Nishikori overcame second seed Andy Murray for a gruelling 1-6, 6-4, 4-6, 6-1, 7-5 see-saw victory on Wednesday to reach the US Open semi-finals.
