ESL One Cologne 2017 was a Counter-Strike: Global Offensive tournament run by ESL. In July 2017, sixteen teams from around the globe competed in an offline (LAN) tournament that featured a group stage and playoffs with a US$250,000 prize pool.^[1] It was the last premier event before the PGL 2017 Krakow Major Championship. In addition, this Cologne event was the first ever Cologne tournament to not host a major as Valve decided to pass over the historic tournament series in favor of the PGL Major.

This tournament was also the first tournament of the Intel Grand Slam, which a list of tournaments run by ESL and DreamHack. The first team to win four titles earns an extra $1,000,000.

ESL invited twelve teams to compete in the tournament. Two teams from Europe, one team from North America, and one team from China competed for the last four spots in three different qualifiers. The group stage was a sixteen team Swiss tournament. The playoffs was an eight team, single elimination best of three bracket, but the grand finals was a best of five.^{[citation needed]}

Host

• Paul "ReDeYe" Chaloner

Desk Host

• Alex "Machine" Richardson

Reporter

• Tres "stunna" Saranthus

Analysts

• Chad "SPUNJ" Burchill
• Adam "friberg" Friberg
• Janko "YNk" Paunović

Commentators

• Anders Blume
• Hugo Byron
• Henry "HenryG" Greer
• Christian "Chrispian" Hart
• Auguste "Semmler" Massonnat
• Jason "moses" O'Toole
• Jack "Jacky" Peters
• Harry "JustHarry" Russell
• Lauren "Pansy" Scott
• Matthew "Sadokist" Trivett

Observers

• Patricia von Halle
• Heather "sapphiRe" Garrozo
• DJ "Prius" Kuntz

Two teams from Europe, one team from North America, and one team from China will qualify for the tournament.^[3][4][5]

In the first round, teams from pool 1 will be matched up against teams in pool 4. Teams in pool 2 will play teams in pool 3. Each team's pool was determined by the tournament organizers.

In the second round, the winners in the first round will face each other in the "high" matches, in which teams with a 1–0 record will play against each other; the losers will face each other in the "low" matches, in which teams with a 0–1 record will play each other.

In the third round, the winners of the high matches (teams with 2-0 records) from round two will face each other. The winners of these two matches will qualify for the major. The losers of the high round and the winners of the low round (teams with 1-1 records) will face each other in the "mid" matches. The losers from the previous low matches (teams with 0-2 records) will face each other in round three's low matches. The losers of these low matches are eliminated. Twelve teams remain in the Qualifier.

In the fourth round, the losers of the high matches and the winners of the mid matches (teams with 2-1 records) will face each other in round four's high matches. The winners of those high matches qualify for the major. The losers of the mid matches and the winners of the low matches (teams with 1-2 records) will face each other in the low matches of round four. The losers of these matches are eliminated from the Qualifier. Six teams remain.

In the last round, the remaining teams will face off (teams with 2-2 records). The winners of these matches will qualify for the major and the losing teams will be eliminated.

Each team's placing, team roster, coach, and prize distribution are shown below. Each team's in-game leader is shown first.