(CNN)Twenty-two-time expansive slam champion Rafael Nadal was upset successful the 4th circular of the US Open connected Monday by American Frances Tiafoe astatine Arthur Ashe Stadium successful Flushing, New York.
In a lucifer that lasted much than 3 hours and 30 minutes, the Maryland autochthonal defeated Nadal 6-4, 4-6, 6-4, 6-3.
Tiafoe, 24, is the youngest American antheral to get this acold successful the US Open since a then-24-year-old Andy Roddick was a finalist successful 2006.
"It was decidedly 1 hellhole of a performance," helium said pursuing the match. "I played truly good today. Yeah, I guess, I mean, I conscionable came retired determination and I conscionable believed I could bash it. It helps I played him a mates times."
Earlier successful the tournament, Tiafoe said helium was blessed to beryllium going mostly unnoticed.
After his triumph Monday, helium expressed joyousness for what his triumph against Nadal meant to his parents, who immigrated to the United States from Sierra Leone.
"I conscionable had a large passionateness for the game. Not adjacent chiefly for me, but to bash it for them. To spot them acquisition maine bushed Rafa Nadal, they've seen maine person large wins, but to bushed those Mount Rushmore guys, for them, I can't ideate what was going done their heads.
"Yeah, I mean, they're going to retrieve contiguous for the remainder of their lives."
Nadal, 36, recorded his archetypal nonaccomplishment successful a expansive slam lawsuit this twelvemonth and is present 22-1 this season. The Spaniard won the Australian Open and French Open earlier withdrawing from Wimbledon successful July earlier his scheduled semifinal showdown with Australian Nick Kyrgios.
"The quality is easy," Nadal said afterward. "I played a atrocious lucifer and helium played a bully match. At the extremity that's it, no?"
Nadal said Tiafoe played much solidly than successful erstwhile matches betwixt the two, served well, had bully backhands and was quick.
"But I don't deliberation I pushed him capable to make him the doubts that I request to create," helium said. "Of course, helium did the things well. If not, helium volition not win, without a doubt. Congrats to him."
Nadal said helium needs to "fix things" and erstwhile helium feels mentally acceptable to vie again, helium will, but helium is unsure astir the timetable.
Tiafoe volition look Andrey Rublev of Russia successful a quarterfinal connected Wednesday.
The US Open men's singles last is scheduled for Sunday.
Tiafoe's parents met successful the United States, wherever they would person twins, Franklin and Frances.
Their begetter signed connected arsenic a time laborer astatine the Junior Tennis Champions Center successful 1999 successful College Park.
While moving astir the clock, his begetter was forced to determination into a vacant retention country astatine the tennis center, wherever his 2 boys would enactment with him, sleeping there, portion their parent worked nighttime shifts arsenic a nurse. Tiafoe picked up the sport, getting to play astatine the halfway for free, and fell successful emotion with the sport.
Tiafoe antecedently said that portion his household didn't turn up wealthy, helium wouldn't alteration anything.
On Monday helium told reporters: "Us being astir tennis was benignant of gets america getting retired of our neighborhood. My dada benignant of being capable to ticker us. It wasn't thing expected to beryllium similar this. Once we got successful the crippled of tennis, it was similar my dada was like, It would beryllium awesome if you guys tin usage this arsenic a afloat assistance to school. I mean, we couldn't spend a university."
CNN's Jill Martin contributed to this report.