Halle Open: Daniel Altmaier vs Daniil Medvedev

Platform comparison

Active sub-markets

Market context

Polymarket is pricing **Daniil Medvedev** at about **59%** and **Daniel Altmaier** at about **41%** on the USDC-settled, Polygon-based conditional token contract, so the market is implying Medvedev remains the likelier advance rather than treating this as a coin flip. That sits close to the tape elsewhere: Tennis.com has Medvedev at **83% projected winner**, while live-score sites are already listing the quarter-final matchup and not showing a major price-disrupting injury narrative.[3][4][5]

The comparison that matters is the pair’s recent Halle meeting, where Medvedev beat Altmaier **6-3, 6-3** to reach the second round, a clean straight-sets result that still anchors a lot of the current read-through on grass.[1] Altmaier’s own Halle run is the main counterweight, though, because ATP coverage notes he has also posted a first main-draw win at this year’s event and has shown enough form on the surface to keep the market from moving much lower than the low-40s.[10][6]

For traders, the near-term catalysts are straightforward: the match status, the actual start time on 19 June, and whether either player is pulled out or delayed in a way that interacts with the contract’s 7-day settlement rule. Robinhood’s similar match market explicitly flags postponement risk, and Polymarket users watching this contract will care most about whether the quarter-final is completed normally, since a cancellation or extreme delay would push resolution towards **50-50** rather than a clean winner.[2][4]

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

Where can I trade this market with the lowest fees?

On Polymarket Legit?, 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 Legit? 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.

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.

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 Legit? triggers a quick verification flow that finishes in minutes.