US Open 2026 pages
Sports · US Open 2026 · Men's Singles · Round of 128
Quentin Halys vs Facundo Diaz Acosta — 6-4 7-5 6-7(7) 6-1
 Quentin Halys✓ | 6 | 7 | 67 | 6 |
 Facundo Diaz Acosta | 4 | 5 | 7 | 1 |
Final · Monday, August 31, 2026 · Round of 128
Result
Halys had played the US Open five times without winning a match, twice arriving through qualifying, and he was three points from ending that on the first attempt of the night. He led by two sets, then the third turned peculiar: Diaz Acosta lost a point when his cap came off mid-rally, saved a match point in the tiebreak, and at 7-6 down — with Halys about to serve for the match a second time — appealed to the umpire to stop for rain, and got it. On the resumption Halys, short of first serves, gave up three points in a row on an unforced error and a double fault and lost the set. He answered it with the cleanest twenty minutes of the match, taking the fourth 6-1 and finishing on his eighteenth ace. He landed 59% of his first serves and won 82% of them, converted six of twelve break points to his opponent's two of seven, and won 144 points to 120 in three hours eleven minutes. "It was necessarily a strange match, with that interruption on match point," he said afterwards. He waits on Zverev and Sonego for a second-round opponent.
Quentin HalysRows the source hadn’t published are left off rather than guessed.
At this Stage
Round of 128, where the draw does its quiet sorting: the winner of this one lands in the Round of 64 against Alexander Zverev or Lorenzo Sonego — which is to say, almost certainly the top seed. That makes this match worth more than its billing: a first-week date with the No. 1 seed is the kind of payday and stage neither man gets often. Sixty-four men's matches run Sunday through Tuesday; a first-round exit pays $140,000, and doubling that requires beating the man across the net, not the name in the next round.
What we know now
What I said beforehand
The preview, frozen before the first serve. Clearly dated, never rewritten — that's the deal that makes the pick worth anything.
Halys. The Frenchman is having the better year by a distance — 30–21 against Díaz Acosta's 5–6 in an injury-thinned season — and the surface splits point the same way: Halys has spent his career on hard courts; the Argentine lefty has won nine tour-level hard-court matches in his life. The one previous meeting went to Díaz Acosta, but that was Winston-Salem three years ago, and current form is a better guide than one distant result. Halys serves big enough to keep his service games short, and Díaz Acosta's clay-built game gives back most of its bite on a fast DecoTurf-descended acrylic. In best-of-five that gap compounds.
The case for Quentin Halys
73% to winHalys is the form pick and the surface pick at once: 30 wins this season, a serve that plays even bigger in New York's quick conditions, and a career built on exactly this court. At 29 he is playing the most consistent tennis of his life, and best-of-five rewards the man whose baseline game doesn't depend on the sets staying short.
The case for Facundo Diaz Acosta
27% to winDíaz Acosta won the only prior meeting, and left-handed patterns disrupt rhythm servers like Halys — the wide slice into the ad court takes away the favorite pattern. His 2026 numbers are ugly partly because he has barely played; a fresh body against a 51-match season is its own kind of edge, and he has nothing to defend.
Both cases written 2026-08-28, before the first ball — frozen into the record exactly as written, whatever the result. The percentages are mine — opinions with a percent sign on. They add to 100 because tennis has no draw to hide the rounding in.
My locked pick: Quentin Halys to advance ✓ RIGHT
“A 30-win season against an opponent with 11 matches played all year, on the surface that most favors his serve.”
Locked 2026-08-28 02:35 UTC — rendered verbatim from the pick ledger; never a fresher, hedged version
Tale of the tape
Quentin HalysFacundo Diaz AcostaPlayer vitals: US Open official player feed (usopen.org) and Tennis Abstract career match logs · as of 2026-08-28.
Career head-to-head: Tennis Abstract career match logs (tour-level) · as of 2026-08-27.
Storylines
- The only previous meeting went to Díaz Acosta — Winston-Salem 2023, on this same summer's hard-court swing.
- Halys arrives with 30 tour-level wins in 2026, the best season of his career at 29.
- Díaz Acosta has played just 11 tour-level matches all season, and his career hard-court record stands at 9–18 — his game was built on Buenos Aires clay.
Head to head
One meeting: Winston-Salem 2023, where Díaz Acosta came back from a set down to win 4-6 6-2 6-4. Both were different players then — it is the Argentine's only tour-level win over Halys on any surface.
Source: Tennis Abstract career match logs (tour-level) · as of 2026-08-27.
Court & schedule: Court 4, Monday 31 August. The US Open posts each day's order of play the evening before; this one is on the board. (Official US Open order of play, as of 2026-08-31)
Weather: Sunday — the men's final, and the last match of the fortnight — was forecast at 78°F with showers and thunderstorms 95% likely, the wettest day of the two weeks and the one day that could not be pushed back. The rain came in the morning and stopped before the final, which Ashe played with its roof open. It cleared from there: 15% overnight, 15% Monday, then dry and sunny. (National Weather Service New York forecast, as of 2026-09-13)
Venue: USTA Billie Jean King National Tennis Center, Flushing Meadows, New York — hard.