Felix Auger-Aliassime faced a stunning defeat at the US Open, becoming the highest-ranked seed to exit the tournament in the second round. The 2022 semi-finalist was expected to make a strong run but fell short against Karen Khachanov, losing in four sets with scores of 6-7(5) 6-3 6-2 6-2 on Thursday.

Despite being ranked No. 50, Khachanov capitalized on Auger-Aliassime's faltering energy levels. The match marked a significant achievement for Khachanov, as he reached the third round of all four Grand Slam tournaments in a single calendar year for the first time.

Key highlights of the match include:

• Khachanov broke Auger-Aliassime's serve seven times.
• He saved seven of nine break points faced during the match.
• Auger-Aliassime initially led the first set 3-0 before succumbing to errors.

Khachanov commented on the match, noting, "I saw that maybe he had some physical issues... it's part of our sport. I wish him to feel better, speedy recovery if he's injured."

The match shifted momentum when Khachanov took the second set after leading 3-0 and continued to dominate with a commanding performance in the following sets. Auger-Aliassime struggled to regain his form, appearing drained as Khachanov raced to a 4-0 lead in the fourth set.

Khachanov closed out the match with a powerful serve, leaving Auger-Aliassime unable to respond. Next, Khachanov will face either Benjamin Bonzi or Ignacio Buse, aiming to advance further in the tournament.