Hagen: Tom Gentzsch vs Henri Squire

Platform comparison

Market context

Tom Gentzsch’s quarter-final against Henri Squire in Hagen is being priced as a clear Gentzsch lean, but not an all-but-certain walkover. The broader market consensus sits around the mid-to-high 50s on a true probability basis: Kalshi is showing Gentzsch at 56%, while Polymarket is around 57% Yes, and several sportsbook-style listings are close to that same range. By contrast, some bookmakers are effectively shorter on Gentzsch in decimal terms, such as 1.60 on PokerStars and 1.57–1.65 elsewhere, which translates to roughly a 62–64% raw implied chance before margin; that gap is a useful reminder that exchange-style prediction prices and sportsbook odds are not directly interchangeable.[2][8][9][11][13][14]

For a trading comparison, the key difference is not the tennis match itself but how each venue expresses and charges for exposure. Polymarket and Kalshi quote in cents or implied probability, so a 57¢ contract is easier to read as a market view than a decimal price, whereas Betfair and Smarkets-style books frame it through decimal odds and take a fee from winning or matched volume, which can make the apparent edge look different after costs and spread. KYC reach also varies: regulated exchanges typically have tighter identity and jurisdiction checks than open crypto-style venues, so the same match can have different participation pools and sharper or shallower pricing depending on the platform.[8][9]

The main catalysts are ordinary but important: official start time, any change in order of play, and whether the match is completed within the market’s settlement window. Flashscore still lists the fixture for 07 August, and several books have it on the day’s slate, but if the match is postponed, abandoned, or stretched beyond seven days without a winner, this market resolves 50-50 under the rules rather than to either player.[1][2][12] That makes late scheduling updates, retirements, and draw-sheet revisions the main risk drivers, especially if one player advances without a full completion.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Hagen: Tom Gentzsch vs Henri Squire specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.