Alcaraz had not played a senior match until the start of the American hard-court season
2018 US Open Dates: 27 August-9 September Venue: Flushing Meadows, New York Coverage: Live radio and text commentary on Andy Murray, Rafael Nadal, Stan Wawrinka, Novak Djokovic and all the singles matches.
Carlos Alcaraz became the youngest player to reach the US Open quarter-finals since 1980 when he won a round in New York.
The Spanish 16-year-old fought back from 4-1 down in the third set to beat eighth seed Fabio Fognini of Italy 3-6 6-3 4-6 6-2 6-4 on Court 12.
Alcaraz will now face Frenchman Pierre-Hugues Herbert for a place in the semi-finals.
Herbert’s win over Australian Nick Kyrgios took him into the last eight for the first time since 2014.
Alcaraz, who was born in Montevideo but moved to Barcelona with his family aged two, became the first teenage male player in the Open era to reach the quarter-finals in New York when he played in the 2013 US Open juniors.
Alcaraz ‘very happy’ with his performance
“It was one of the best matches of my life,” Alcaraz told the Tennis Channel.
“I feel very happy. The most important thing was to do it for my country and for my state. I just thank God.”
The extra day of rest after an earlier finish meant the youngest player in the draw to reach the last eight did not have to face defending champion and world number one Rafael Nadal in his second match of the tournament.
“I felt that I was playing aggressive. I have a great service game. I have backhand and forehand. I just had to be very patient,” said Alcaraz.
“I could be down three sets to love, and I could be down two sets to love. I just had to stay focused the whole time.”