Geneva Open: Stefanos Tsitsipas vs Learner Tien

Platform comparison

Active sub-markets

Market context

Stefanos Tsitsipas and Learner Tien are set to play in the Geneva Open round of 16, with the winner advancing to the quarter-finals. The market is priced at 0% YES, which is consistent with Tsitsipas being the established ATP-level player and Tien still a rising tour-level prospect. Recent reporting and event listings point to the match being on the schedule for 20 May, with ATP’s own coverage framing it as a completed contest in which Tien defeated Tsitsipas.

For context, markets on individual tennis matches usually track the draw, injury updates and whether the match is actually played to completion rather than broader tournament sentiment. A 0% line can reflect stale pricing when a result has already been decided or when the market has not refreshed against confirmed scores. In comparable ATP events, once a player advances, the uncertainty is mostly about whether the result has been recorded cleanly within the settlement window rather than about the sporting matchup itself.

The key catalyst is the official match status and score reporting from the ATP and the tournament feed, with Flashscore and ATP Tour both listing the fixture and ATP Tour publishing a highlight noting that Tien beat Tsitsipas in Geneva. Traders should watch for any administrative correction, score verification or unusual settlement issue, but absent that, the decisive factor is whether the recorded result stands and is reflected before the 27 May window closes.

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Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Geneva Open: Stefanos Tsitsipas vs Learner Tien plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

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.

What does it cost to trade on PolyGram?

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

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.

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.