NEW YORK — Noah Rubin will stick around the U.S. Open for at least a few more days before he starts his freshman year at Wake Forest.

He’s already enrolled in classes: art history, writing, astronomy and Intro to Judaism.

And what if he’s asked in his writing course to pen an essay on what he did over the summer?

“I played a little tennis, recreationally, and took it from there,” Rubin said with a smile.

A little tennis that took the 18-year-old all the way to the junior Wimbledon title.

Rubin made his Grand Slam main draw debut Tuesday at the U.S. Open, a spot he earned by winning the USTA Boys’ 18s National Championship. He lost to 66th-ranked Federico Delbonis of Argentina 6-4, 6-3, 6-0.

“I learned that I can definitely compete with these guys at the best level, definitely things to learn,” Rubin said. “Fitness is one. Nerves came into play a little bit also.”

Rubin grew up nearby in Long Island and drew a standing-room-only crowd on Court 13.

Asked how many he knew personally, Rubin said, “Too many.”

He has decided to forego playing next week’s junior event, but his U.S. Open isn’t over quite yet.

He also earned a spot in the doubles main draw by winning the USTA Boys’ 18s title Stefan Kozlov. The 16-year-old Kozlov was Rubin’s opponent in the junior Wimbledon final last month.

If they win their first-round match, they face 15-time major champions Bob and Mike Bryan. Now that would be a great story, too.