San Marino: Vilius Gaubas vs Thiago Monteiro

Platform comparison

Market context

Vilius Gaubas’ San Marino meeting with Thiago Monteiro is priced as a near-certainty in the prediction market, with the contract showing a 100% implied probability for Gaubas. That sits well above the more conventional tennis data points available today: ATP and live-score style listings show a live or scheduled head-to-head for the San Marino event, but they do not support anything like a locked result before play begins[2][6][8]. On comparable evidence, Monteiro has had the better of the pairing in prior meetings, including a straight-sets win in 2024 and another listed result in 2025, so a 100% price is not a reflection of historical dominance by Gaubas[3][13][16].

The main market question is therefore not tennis quality alone, but whether the match is actually completed inside the settlement rules. For contracts like this, the key catalysts are the official order of play, any last-minute withdrawals or retirement news, and whether the fixture is moved far enough that it misses the seven-day window, in which case the market can settle 50-50 rather than on a player advance. Current match listings indicate the San Marino tie is on the schedule, which reduces near-term event risk, but traders should still watch tournament updates and live match status because a start without completion changes the outcome mechanics materially[2][8][11].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews San Marino: Vilius Gaubas vs Thiago Monteiro across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.