Casper Ruud makes the most notable jump on the race standings this week, rising from No. 13 to No. 11 after a semifinal run in Tokyo.

He became the first American man to contest a major final in 15 years and finished a career-best world No. 4.

With his supercharged pace and nerveless precision, the Italian looks like the new men’s standard-setter.

ATP chairman Andrea Gaudenzi made the announcement during the trophy ceremony after Italy's own Jannik Sinner beat Taylor Fritz in the final.

The Italian, who was born in 2001, is the first man born in 2000 or later—or even 1990 or later—to achieve the feat.