Spanish teenager Carlos Alcaraz beats Jannik Sinner in epic marathon Quarter finals match in New York

Carlos Alcaraz reached his first major semi-final after beating Jannik Sinner in a US Open thriller quarterfinals which lasted over 5 hours at 2.50am in New York

Alcaraz, 19, saved a match point before defeating 21-year-old, 11th seed Sinner, in a titanic battle, 6-3 6-7 (7-9) 6-7 (0-7) 7-5 6-3.

Alcaraz won the match with his first match point after saving Sinner's match point in the 4th set and saving 5 set points in the second. The match took five hours and fifteen minutes to complete.

Alcaraz collapsed to the court in elation after winning. The teenager reached his first Grand Slam semifinal and is the youngest to reach the U.S. Open since Pete Sampras won the title at 19 in 1990.

Alcaraz had lost to Sinner in the fourth round at Wimbledon in July, but he came out strong at Flushing Meadows to win a fantastic opening set that hinted at the possibility of a classic.

The third seed will face No. 22 Frances Tiafoe of the United States on Friday for a spot in Sunday's final. Tiafoe, the first black American man to reach the US Open last four

In the men's singles event at Flushing Meadows, a first-time Grand Slam champion is already guaranteed, with Casper Ruud of Norway and Karen Khachanov of Russia vying for the other semifinal spot.