Frances Tiafoe of the United States produced the performance of a lifetime to send Rafael Nadal crashing out of the US Open in a stunning fourth round upset on Monday.
Tiafoe, who had only reached one major championship quarter-final in his career before, shattered Nadal's hopes of adding to his record collection of 22 Grand Slam singles titles with a 6-4, 4-6, 6-4, 6-3 victory.
A packed Arthur Ashe Stadium crowd roared in delight as the 24-year-old 22nd seed bombarded Nadal with 18 aces and 49 winners to seal victory in 3hr 34min.
The win sends Tiafoe into a last eight showdown against Russian ninth seed Andrey Rublev on Wednesday.
"I don't even know what to say right now," Tiafoe said after his superb victory. "I'm beyond happy, I'm almost in tears. I can't believe it.
"He's definitely one of the greatest of all time. I played unbelievable tennis today but yeah - I really don't know what happened."
Tiafoe, the son of immigrants from Sierra Leone who began playing tennis as a four-year-old when his father worked as a live-in caretaker at a tennis facility in Maryland, had never gone further than the fourth round at the US Open in seven previous appearances.
"When I first came on the scene a lot of people had expectations of me of how I would do and stuff, but I wasn't ready for it. Mentally I wasn't mature enough for those moments," Tiafoe said.
"But these last couple of years I've been able to put my head down and develop."
Nadal paid tribute to Tiafoe's performance, and admitted he had struggled to cope with the American's tactic of moving him around the court.
'I played a bad match'
"I played a bad match and he played a good match. At the end that's it, no?," Nadal said.
"Tennis is a sport of position a lot of times, no? If not, you need to be very, very quick and very young. I am not in that moment anymore," the 36-year-old said.
Early morning epic
Carlos Alcaraz reached the US Open quarter-finals for a second successive year when he defeated 2014 champion Marin Cilic in an epic last-16 tie which finished at 02:23 a.m. on Tuesday.
In a gruelling three-hour and 54-minute encounter, Cilic was under siege, having to save 12 of 18 break points while committing 66 unforced errors.
The 19-year-old Alcaraz, seeded three and seen as the title favorite after the elimination of four-time champion Rafael Nadal, will face Jannik Sinner of Italy for a semi-final place.
Sinner holds a 2-1 advantage over Alcaraz with both wins coming this year at Wimbledon and Umag.
"I believed in myself, it was pretty tough," said Alcaraz.
"I was a break down in the fifth set. It was tough to come back after losing the fourth set."
Sinner into QFs
Earlier, Italy's Jannik Sinner reached a Grand Slam quarter-final for the third time this season after beating unseeded Ilya Ivashka in five sets.
The 11th seed squeezed past the 28-year-old Belarusian 6-1, 5-7, 6-2, 4-6, 6-3.
The Monaco-based 21-year-old has performed consistently well at Grand Slams this year, reaching quarter-finals at the Australian Open and Wimbledon, and the fourth round at the French Open.
Rublev downs Norrie
Andrey Rublev shrugged off a rain delay to breeze past Cameron Norrie and reach the quarter-finals for the third time.
The ninth-seeded Russian triumphed 6-4, 6-4, 6-4 and will face Frances Tiafoe of the United States for a place in the semi-finals.
"It was two and a half hours, it was tough," said 24-year-old Rublev who had needed four hours and five sets to get past Denis Shapovalov in the third round.
"Cameron and I, we have known each other for a long time. I knew I had to give my best.
"I played a good match. I was able to win in three sets so I am super happy,"
Rublev, who also made the last-eight in New York in 2017 and 2020.