Hagen: Tom Gentzsch vs Henri Squire

Platform comparison

Market context

Tom Gentzsch is due to play Henri Squire in the Hagen Challenger, and the market is currently pricing a Gentzsch advance as near-certain despite the live sports books still showing a more conventional match price. PokerStars has Gentzsch at 1.60 and Squire at 2.15, which converts to roughly a 62.5% implied chance for Gentzsch before margin; TennisTemple shows a similar band, with an average of 1.64 versus 2.15 across listed books[1][3]. That sits a long way from the 100% YES on the prediction market, so the platform comparison matters: Polymarket-style contracts trade in pure implied probability terms, while sportsbook odds include margin and, on some venues, exchange-style commission rather than a fixed overround.

For context, the broader market consensus still favours Gentzsch, but not by enough to justify a literal certainty in a standard betting frame. Several model and tip sites cluster around 57% to 63% for Gentzsch, including BetClan at 63% and Umpiry at 57%, while Robinhood’s prediction-market display shows Gentzsch at 99¢ and Squire at 1¢, indicating a much tighter retail crowd consensus than the bookmaker boards[7][8][14]. Betfair-listed prices on TennisTemple are broadly in line with the other books, which is useful for comparison because Betfair’s exchange format, Smarkets’ low-commission model, and Kalshi’s fee structure can all produce materially different net prices even when the headline probability looks similar[3].

The main catalysts are simple: confirmation that the match actually starts, whether the scheduled order holds, and any sign of retirement or postponement. Flashscore and PokerStars both had the match listed for 7 August, with live betting available once underway, so a delay into the evening or a walkover would matter more than pre-match opinion once the settlement clock is close[1][16]. For markets like this, the important dependency is not only who is favoured, but whether the event is played to completion within the seven-day window; if not, the contract can revert to 50-50 under the stated rules.

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 Kalshi Alternative UK, 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.

UK Frequently Asked Questions

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.

Polymarket vs Betfair Exchange: which is better for UK prediction trading?

Betfair Exchange offers UKGC regulation, GBP settlement, and potentially tax-free winnings — but focuses on sports and politics only. Polymarket has deeper liquidity, 0% platform fee, global event coverage, and crypto/geopolitical markets Betfair doesn't offer. For UK traders: Betfair for regulated GBP sports markets; Polymarket for broader, global prediction events.

Is Kalshi available in the UK?

Kalshi is a US CFTC-regulated prediction exchange. UK residents can create accounts but must use USD and US payment methods. Kalshi's product range overlaps with Polymarket but with lower liquidity on most contracts. For UK traders, Polymarket typically offers better prices due to higher global volume.