NBA Summer League: Toronto Raptors vs. Boston Celtics

Platform comparison

Market context

The Boston Celtics defeated the Toronto Raptors 83–80 in their NBA Summer League clash on Friday, 10 July 2026, in Las Vegas, with the game broadcast on ESPN. This outcome resolves the prediction market titled “NBA Summer League: Toronto Raptors vs. Boston Celtics” as Boston Celtics, rendering the 0% YES probability for a Raptors win consistent with the final result.

Historically, Summer League contests between established franchises like the Celtics and Raptors often favour the team with deeper two-way contract pipelines and recent draft picks integrated into the roster. In this case, the Celtics’ inclusion of 24-year-old British-born player Williams, their 46th overall pick in the 2025 draft, on a second two-way contract provided a measurable edge that aligned with sportsbook lines and analyst consensus, both of which favoured Boston ahead of the game.

Traders should monitor post-game roster announcements and injury updates from both teams, as Summer League performances frequently influence early-season two-way contract decisions. Audacy reported that the Celtics held a practice in Las Vegas before the matchup, underscoring preparation as a key catalyst, while the Raptors’ lack of similar pre-game coverage may signal less structural readiness. The game’s completion on 10 July confirms the settlement window has closed, and no further trading is possible.

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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 Best Prediction Markets, which mirrors the Polymarket order book directly.

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.

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.