Carlos Alcaraz appears to be in peak form as he continues to advance in the U.S. Open . The Spanish phenom has not lost a set in any of his first four matches in the tournament, and his latest triumph was a 7-6, 6-3, 6-4 triumph over Arthur Rinderknech. Expand Tweet

Alcaraz has reached the quarterfinal round of his 13th major tournament . He is the youngest player to achieve that level of success at 22 years and 3 months. He is six months younger than Boris Becker was when he reached his 13th quarterfinal. Swedish all-time great Bjorn Borg was also younger than 23 when he reached 13th quarterfinal.

Alcaraz's opponent on Tuesday will be No. 20 Jiri Lehecka, a 23-year-old from the Czech Republic. Lehecka advanced to his second Slam quarterfinal with a 7-6, 6-4, 2-6, 6-2 win over Adri

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