Maiden.bet

US Open Predictions & Picks — September 9, 2026

By The Maiden Desk · September 9, 2026

Every number below was fixed before the match and graded against the official result.

Share card

3 matches are on Wednesday's card at US Open, and we have a pick for every one of them. The headline act: Ben Shelton against Carlos Alcaraz in the quarterfinal. Our calls: Alcaraz over Shelton, Zverev over Zandschulp, Blockx over Khachanov.

The boldest call on the card: Blockx over Khachanov — the market disagrees with us there.

Ben Shelton vs. Carlos Alcaraz

✗ Pick wrongWe got this one wrong. Our final number was 67% on Carlos Alcaraz; Ben Shelton won 6-7 6-1 6-3 1-6 7-6.

Pick: Alcaraz

Win probability: 67% Alcaraz · Market: -310 · Sets: 4+ (51%) · most likely score 3-0 (36%)

Wednesday's US Open quarterfinal pits Ben Shelton against Carlos Alcaraz on hard. Carlos Alcaraz brings a 5-match winning streak into this one, 9-1 across the last ten. Ben Shelton has won 3 in a row and 9 of the last 10 overall.

There's a wide gap in our ratings on hard, and our number follows from it. Alcaraz should have enough here, though Shelton has the tools to make the scoreboard uncomfortable.

Alexander Zverev vs. Botic Van De Zandschulp

✓ Pick rightNailed it. We had Alexander Zverev at 74% before the match, and Alexander Zverev won 6-2 7-5 6-1.

Pick: Zverev

Win probability: 74% Zverev · Market: -604 · Sets: 3 (51%) · most likely score 3-0 (42%)

Wednesday's US Open quarterfinal pits Alexander Zverev against Botic Van De Zandschulp on hard. Alexander Zverev is rolling — 3 straight wins, 7 of 10 in recent play. Botic Van De Zandschulp brings a 3-match winning streak into this one, 7-3 across the last ten.

Alexander Zverev is clearly higher-rated on hard — our number puts Zverev around 74%. Zandschulp needs several things to break right at once; the percentages say they usually don't.

Alexander Blockx vs. Karen Khachanov

Not gradedThis match ended in a retirement, advancing Karen Khachanov. It is excluded from our graded record — no pick is counted as right or wrong.

Pick: BlockxUpset call

Upset call: the market favors Khachanov; our numbers say Blockx.

Win probability: 60% Blockx · Market: +153 · Sets: 4+ (68%) · most likely score 3-1 (23%)

Wednesday's US Open quarterfinal pits Alexander Blockx against Karen Khachanov on hard. Alexander Blockx is rolling — 4 straight wins, 7 of 10 in recent play. Karen Khachanov has won 3 in a row and 5 of the last 10 overall.

Blockx's 75.1% behind the first serve (against 72% for Khachanov) means break chances should be scarce in one direction. Expect resistance, but the match-level math tilts clearly toward Blockx.

Get the free ebook + tomorrow's picks

Sign up for the daily desk email and our nine-chapter beginner's guide to trading sports prediction markets comes free as a PDF. One email a day with the day's free picks in full, unsubscribe anytime.

Updated Sep 8, 2026, 12:30 AM UTC. Picks are frozen before first serve and graded on the track record page — this page is never edited after the fact.