Nick Kyrgios let all the frustration out on his racket, threw his bag over his shoulder and then stomped out of the suddenly quite quiet Arthur Ashe Stadium: The entertainer of the tennis scene has his chance for a first Grand Slam title in the quarterfinals the US Open playful. 

The 27-year-old had to admit defeat 5: 7, 6: 4, 5: 7, 7: 6 (7: 3), 4: 6 to the Russian Karen Chatschanov, who was fighting undeterred and was correspondingly frustrated.

For his opponent, silver medalist from Tokyo 2021, it is the biggest success in a Grand Slam so far. 

"I'm very proud of myself"

"Now you're showing me a little affection after all," Khachanov then said in the direction of the audience, most of whom had stood by Kyrgios: "I was ready to run five sets and fight.

I'm very proud of myself, I stayed focused from start to finish."

Chatschanov now meets Casper Ruud.

The Norwegian also kept his chance to jump to the top of the world rankings with a highly convincing 6: 1, 6: 4, 7: 6 (7: 4) against the Italian Matteo Berrettini.

"I don't want to think too much about the number one," says Ruud: "Of course every boy dreams of it."

Ruud needs to reach at least the final to pass Rafael Nadal.

If he then meets the top talent Carlos Alcaraz on Sunday, who first has to solve his quarter-final against Jannik Sinner on Wednesday (local time), the winner would take the top position in the ranking.

Russia's Andrej Rublew and crowd favorite Frances Tiafoe determine the fourth semi-finalist.

In the women's competition, Ons Jabeur believes in her chance - and wants to benefit from the experience of her participation in the Wimbledon final.

"Even though I lost the final, I knew afterwards that I had a Grand Slam title in me," said the Tunisian after the 6: 4, 7: 6 (7: 4) against Australia's Ajla Tomljanovic: " And now I'm in the semifinals of the US Open."

She meets Caroline Garcia from France, who prevailed 6: 3, 6: 4 against US hope Coco Gauff.

Czech Karolina Pliskova and Belarusian Aryna Sabalenka determine the other semi-finalists in the first duel on Wednesday, before title favorite Iga Swiatek from Poland is challenged by American Jessica Pegula.