LoL: Team Secret vs Sentinels (BO1) - Esports World Cup Group B

Platform comparison

Market context

League of Legends Upper bracket semifinal 1 at the Esports World Cup Group B pits Team Secret against Sentinels in a single-game elimination, scheduled for 5:00AM ET on 15 July. The crowd-implied probability of Team Secret winning sits at 0%, suggesting the market views Sentinels as near-certain victors despite the BO1 format introducing higher variance than standard series.

Historically, 0% probabilities in BO1 esports markets rarely hold; even heavy favourites like T1 or G2 have lost single games to underdogs due to draft anomalies or early-game errors, with Polymarket data showing 12% of such “certain” outcomes resolving against the implied favourite in 2025–2026[1]. Programmatic traders often deploy conditional orders to buy the underdog once odds dip below 5%, exploiting the market’s tendency to overcorrect on perceived skill gaps in one-off matches.

Key catalysts include pre-match roster confirmations, patch-specific meta shifts, and any delay notifications from the Esports World Cup organisers, as a 7-day unresolved delay triggers a 50-50 settlement. A recent announcement from the tournament’s official channel confirmed no roster changes for either team ahead of the match, but traders should monitor live Discord channels for potential server issues or scheduling adjustments that could invalidate the 0% pricing[1].

Sources: 1

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.

FAQ

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 Polymarket Review 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.

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.

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.