Alex Michelsen's US Open Journey: From Underdog to Quarterfinals

If you had Alex Michelsen penciled into the US Open quarterfinals, you weren’t just optimistic. You were clairvoyant.

The 22-year-old from Aliso Viejo, California, has ripped through the draw in New York, flattening opponents and not surrendering so much as a single set in four matches. Unseeded, unbothered, and suddenly unavoidable, he now stands one win from a career-altering semifinal.

The catch? Frances Tiafoe is waiting.

An American surge with teeth

Michelsen arrived at this US Open ranked No. 46 on the ATP Tour, a promising name rather than a headline act. That’s changed quickly.

His tennis this fortnight has been sharp, direct, and ruthless. The two-handed backhand is compact and reliable, but it’s the serve that has turned this run into something serious. At times it looks unreturnable; when it does come back, Michelsen has been stepping in and ending points with cold efficiency.

The numbers from his fourth-round win over No. 27 seed Tomas Martin Etcheverry tell the story: 44 winners in a straight-sets victory, 7-6 (8-6), 6-4, 6-4. The tiebreak in the opener felt like a test of nerve. Michelsen passed, then accelerated.

Before that, he’d already shown this wasn’t some soft draw he was padding. In Round 2 he dismantled No. 16 seed Brandon Nakashima 6-3, 6-4, 6-4, backing up a solid opening win over Federico Cina, 6-4, 6-1, 6-0. Daniel Merida pushed him to a first-set tiebreak in Round 3, but Michelsen shut that door as well: 7-6 (7-5), 6-4, 6-3.

Four matches. Four straight-sets wins. Not a hint of a wobble.

From Athens-bound to New York breakthrough

Michelsen was supposed to be the next big thing in college tennis. A product of Laurel Springs School and the top-ranked American-born recruit in 2023, he signed a letter of intent with the University of Georgia men’s program. Athens, college courts, and the NCAA spotlight seemed inevitable.

He never showed.

Instead, Michelsen turned professional that same year, betting on himself early. The gamble didn’t come out of nowhere. His junior résumé already carried real weight: the 2022 Wimbledon boys’ doubles title and a run to the boys’ doubles final at the 2022 Australian Open. That same year he dipped his toes into the Grand Slam waters, making his major debut in doubles at the US Open, though it ended in a first-round exit.

Singles on the sport’s biggest stages took a little longer to ignite. A wild card at the 2023 US Open brought his first Grand Slam main-draw appearance in singles. A year later, he finally cracked the second week at a major, reaching the fourth round at the 2025 Australian Open.

New York has now taken that progress and launched it into another tier. This is his first Grand Slam quarterfinal. Reach the semifinals and the ranking will follow: a leap into the top 30 and a new career high. The financial bump is already significant—over $1 million in prize money earned so far in 2026, with another $780,000 guaranteed from this quarterfinal run alone.

For a player who skipped the college route, this is validation in real time.

The road to Tiafoe

The path here has been clean, almost too clean for a player about to run into one of the tour’s toughest competitors.

• Round 1: def. Federico Cina 6-4, 6-1, 6-0
• Round 2: def. No. 16 Brandon Nakashima 6-3, 6-4, 6-4
• Round 3: def. Daniel Merida 7-6 (7-5), 6-4, 6-3
• Round 4: def. No. 27 Tomas Martin Etcheverry 7-6 (8-6), 6-4, 6-4

The scores show control. They also hint at something else: when sets get tight, Michelsen doesn’t blink.

That composure will be tested now.

A familiar problem: Frances Tiafoe

Next up is No. 11 seed Frances Tiafoe in Tuesday’s quarterfinal. Another American. A bigger stage. A different kind of fight.

Michelsen has seen this matchup before and hasn’t solved it yet. The two have met twice, and both times Tiafoe walked away the winner. That history matters. So does the context: Tiafoe is seasoned under the New York lights, a proven performer at the US Open, and one of the most dangerous players when the crowd swings behind him.

For Michelsen, this isn’t just a shot at a semifinal. It’s a chance to flip a head-to-head that has gone against him, to prove that this surge is more than a hot week and a favorable groove on his serve.

He has the weapons. He has the momentum. On Tuesday, he finds out if that’s enough against a man who has already stood where he wants to go.