Halle Open: Frances Tiafoe vs Felix Auger-Aliassime

Platform comparison

Active sub-markets

Market context

Frances Tiafoe and Felix Auger-Aliassime are set to meet in Halle, with Tennis.com listing Auger-Aliassime as the projected winner at 60% and the ATP’s Halle highlights page showing both players have already advanced in the 2026 event.[2][5] That makes a 100% crowd-implied price look less like a match readout and more like a function of thin trading, where early money can dominate until fresh liquidity arrives.

For comparison, the pair have built a matchup profile that has moved both ways, and the ATP keeps a dedicated head-to-head record for them, which matters because grass-court form can swing quickly from one round to the next.[4] Auger-Aliassime has also been through longer matches in Halle this week, including a three-set win over Nuno Borges, while Tiafoe has produced an upset over Flavio Cobolli, so recent set scores support the idea of a competitive market rather than a settled one.[1][5]

The main catalysts are practical rather than theoretical: final start-time confirmation, any change to the order of play, and whether either player is carrying fatigue from earlier rounds. In markets like this, book depth is often shaped by funding friction as much as tennis—deposit methods such as Klarna or SEPA bank transfer tend to pull in different participant groups than USDC, and withdrawal convenience can affect how quickly liquidity recycles after a match is priced in. If the fixture is delayed, suspended, or not completed before the settlement deadline, the market’s fallback rules become more important than pre-match opinion.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Halle Open: Frances Tiafoe vs Felix Auger-Aliassime on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Deposit UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket Deposit UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

What does it cost to trade on Polymarket Deposit UK?

Zero. Polymarket Deposit UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Deposit UK triggers a quick verification flow that finishes in minutes.