The Electronic Sports League has revealed more details about the North American qualifier for ESL One Cologne.

Held inside ESL's studio, in Burbank, California, the North American qualifier for ESL One Cologne will see eight teams go head-to-head for two spots at the upcoming $250,000 major.

The top four sides from the North American division of the ESL Pro League will be joined by four teams coming from an open online preliminary qualifier, scheduled for June 27-28.

Cloud9 are currently topping the Pro League table in North America 

Should Keyd Stars - who have already secured a place at ESL One Cologne - finish the ESL Pro League season in the top four, then the Brazilian team's spot at the offline qualifier will go to the team who finish fifth.

Teams can sign up for the open pre-qualifier by going here. The tournament will use a single-elimination, best-of-three bracket format.