Dota 2: Team Spirit vs Xtreme Gaming (BO3) - The International Group Stage

Platform comparison

Market context

Team Spirit face Xtreme Gaming in a best-of-three opening fixture at The International 2024 group stage, with the match scheduled for 13 August at 01:00 ET. The Polymarket contract currently prices Team Spirit victory at 65% implied probability, reflecting their standing as the stronger outfit on paper. Settlement hinges on a decisive result within the scheduled window; cancellation, ties, or delays exceeding seven days without completion trigger a 50-50 resolution.

Team Spirit's recent form and roster stability provide the foundation for their favouring. The Russian organisation qualified directly to the group stage and has maintained consistent performances across regional qualifiers, whilst Xtreme Gaming, a Chinese squad, advanced through the lower bracket of their regional qualifiers. Historical precedent suggests top-seeded teams convert group-stage advantages into wins roughly 70% of the time at The International, though upsets occur when preparation gaps narrow or meta shifts favour the underdog's draft tendencies.

Traders should monitor team announcements regarding final roster confirmations and any schedule adjustments from Valve in the 48 hours preceding the match. Patch notes released before the tournament can significantly alter hero viability and team preparation timelines. Additionally, watch for injury or personal circumstances affecting key players, which occasionally emerge during the tournament's opening days. The match's position as a round-one fixture means both teams enter with full preparation time, reducing the likelihood of logistical delays that sometimes plague later stages.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.