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What Is WSCI? The 2026 World Star Challengers Invitational Format and Qualification

WSCI is Riot Games and TJ Sports’ 2026 international Tier 2 League of Legends invitational. Here’s how teams qualify, advance from groups, and compete in playoffs.
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WSCI is the 2026 World Star Challengers Invitational, an international Tier 2 League of Legends tournament created through a collaboration between Riot Games and TJ Sports. Its 16 teams play a best-of-one group stage, followed by a best-of-five, single-elimination playoff for the eight group-stage qualifiers.

What WSCI is

Riot Games describes the 2026 World Star Challengers Invitational as a global stage for Tier 2 League of Legends teams. Riot calls the event a pilot for international Tier 2 competition, with the stated goals of enabling cross-regional competition and supporting development in the Tier 2 pipeline. Those are the organizer’s aims, not measured outcomes. Riot’s announcement was published September 3, 2026.

How teams qualify and how the field is drawn

The field has 16 teams: China, Korea, APAC, the Americas, and EMEA each contribute three, and the Asia Masters champion takes the remaining place.

Riot’s announcement says each region’s teams are identified through a mix of qualification pathways, but does not specify the exact criteria or selection process for each region. There is therefore no single detailed qualification route in the announcement that can be applied to all five regions.

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For the group draw, teams are divided among three seeding pools. Each group receives one team from Pool 1, one from Pool 2, and two from Pool 3. A group cannot have more than two teams from the same region, and a Pool 1 team and a Pool 2 team from the same region cannot be placed together.

How the tournament format works

Group stage: September 20–25, 2026

The 16 teams are split into four groups of four. Each group plays a double round-robin, so every pair of teams meets twice. All group-stage matches are best-of-one. Riot lists 48 group-stage matches across six match days, with eight matches each day.

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The top two teams in each group advance, producing an eight-team playoff field.

Playoffs: September 27–October 2, 2026

The playoffs use a single-elimination bracket with quarterfinals, semifinals, and a final. Every series is best-of-five: lose a series and the team is eliminated. The bracket consists of seven series, and Riot scheduled the final for October 2, 2026.

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Stage Structure Match format How teams advance
Group stage, September 20–25, 2026 Four groups of four; double round-robin Best-of-one Top two in each group advance
Playoffs, September 27–October 2, 2026 Eight-team, single-elimination bracket Best-of-five series Win each series to remain in the tournament

Rules and details not specified in the announcement

The announcement explains the broad format, but it is not a complete rulebook. It does not state the group-stage tiebreakers, provide detailed game rules, or set out roster eligibility requirements. Those details should not be inferred from the format summary.

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Where to watch

Riot says viewers can follow WSCI through regional Tier 2 social channels and regional co-streamers. The announcement does not identify specific channel URLs.

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