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

Platform comparison

Market context

Team Spirit’s Round 2 meeting with Aurora at The International Group Stage is priced around a modest Spirit edge, with the crowd-implied 56% YES sitting broadly in line with a favourite that is not overwhelming. On form and history, that looks conservative rather than aggressive: Liquipedia shows Spirit beat Aurora 2-0 at DreamLeague S29 in May 2026, while their earlier 2026 meetings were split across a 2-3 series and a 0-2 loss for Spirit at FISSURE Universe 8[9]. Head-to-head records from community databases still lean strongly Spirit’s way overall, with 9 to 11 Spirit wins depending on the tracker and no clear Aurora edge in the series sample[1][2].

That historical angle matters because Aurora have repeatedly been competitive without consistently converting into series wins. Flashscore’s broader team page shows Aurora’s recent Dota record has included stretches of both wins and losses, while GGScore pegs their long-run win rate at roughly 43%, suggesting a side that can pressure stronger opposition but has not been as reliable as Spirit over time[15][16]. In comparable Spirit-Aurora best-of-three and best-of-five meetings, Spirit have often been priced as the better team and have generally justified that status, which supports a market that keeps them ahead but leaves room for a live upset if the draft breaks Aurora’s way[1][2][9].

The main trader catalysts are scheduling and format confirmation rather than roster speculation, because Sofascore lists the match as starting 14 August 2026 at 02:00 UTC, which is consistent with the market’s stated window and leaves little room for a delay-driven reprice unless Valve or the organiser changes the group-stage slate[14]. Any late substitution, technical pause, or format adjustment would matter most for a contract that settles 50-50 if the series is not played or ends level, although a standard BO3 at The International should still produce a decisive winner if it goes ahead as planned.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi vs Polymarket, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi vs Polymarket trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.