US Open, Qualification ATP: Pol Martin Tiffon vs Tom Gentzsch

Platform comparison

Market context

Pol Martin Tiffon and Tom Gentzsch met in the first round of US Open qualifying, with the market still showing 0% YES even though the match was scheduled for 24 August and set against a narrow pre-match edge for Gentzsch. Sportsbook pricing was more balanced: Gentzsch was around 1.50-1.70 favourite, with Tiffon roughly 2.08-2.59, while the contract was described at one point as 33% for Tiffon and 67% for Gentzsch, underlining a notable gap between exchange-style pricing and the current crowd-implied zero.[1][3][4]

That split is easier to read in the context of qualifying tennis, where short-format matches and compressed schedules can move prices quickly, yet rankings still matter. Tennis.com listed Gentzsch around 145 in the world and Tiffon around 209, which fits the market leaning towards Gentzsch rather than a coin flip, while a German Tennis Federation preview also noted Gentzsch had a ranking advantage of roughly 60 places.[6][9] In comparable early-round Slam qualifying ties, the lower-ranked player can still attract support if the opponent is coming through a heavy travel block or uncertain form, but the baseline consensus here was firmly with Gentzsch.[1][6]

The main catalyst for traders was whether the match would actually be played as scheduled on Court 13, because qualification draws can shift with weather, court backlog, or injury withdrawals, and the contract only resolves to 50-50 if the match is not completed or remains undecided by 7 September. ESPN listed the fixture in Monday’s qualifying slate, and the German federation’s preview described it as part of the opening day schedule at Flushing Meadows, with three qualifying rounds needed before the main draw begins on 30 August.[6][15] If the match was delayed, rescheduled, or interrupted, that would matter less for outright winner pricing than for settlement risk, which remains the key distinction between this contract and a standard sportsbook line.[3][6]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.