Halle Open: Daniel Altmaier vs Daniil Medvedev

Platform comparison

Active sub-markets

Market context

Daniel Altmaier and Daniil Medvedev have already played their Halle quarter-final, and Altmaier won 6-4, 6-7(6), 6-4 to advance to the semi-finals.[1][3] For a market that settles on which player advances, a current crowd price of 100% YES is consistent with a result that has already been formally recorded by the ATP match archive.[3]

Historically, this kind of tennis market should be read against the scoreboard state rather than pre-match reputation: Medvedev was the higher seed and a two-time Halle finalist, but Altmaier produced the upset on home grass and converted the match into a completed progression event.[1][2] In practical tooling terms, a bot or conditional-order setup would normally key off official ATP live scores, the tournament draw status, and the archive result page, because once the ATP marks the match as finished, there is little room for ambiguity unless a settlement rule specifically treats abandonments or cancellations differently.[3][8]

The main catalysts to watch in similar markets are schedule changes, walkovers, retirements, and any official correction to the match record; here, the ATP archive already shows the winner, which is the strongest signal for automated resolution logic.[3] Third-party scoreboards and replay listings also align with the quarter-final finishing as Altmaier over Medvedev, so a programme monitoring this market would treat the event as effectively locked unless the venue or tour later issues a rare correction.[5][7][8]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Halle Open: Daniel Altmaier vs Daniil Medvedev 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

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

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

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.