2 regions, 6 teams.
Top 3 from 2017 NALCS Spring
Top 3 from 2017 EULCS Spring
Double round robin. All matches are best of 1. Top team from each region will advance to the Final.
Format:
http://riot-web-cdn.s3-us-west-1.amazonaws.com/lolesports/s3fs-public/styles/centered/public/2017_rr_format_infographic_na_eu_v2_0.jpg?CqA7M1eqmdUFPZXkgTAikmSeBNKu1ep7