The tournament is played on a knockout format, with 37 teams participating.

Initially 10 teams play a qualification round with the 5 winners advancing to the main phase.

On 14 June 2017, a drawing of lots in Luxembourg City, Luxembourg, determined the team's pairing for each match.

After two legs, the team with the most result points advances to the next round.

The Golden Set winner is the team that first obtains 15 points, provided that the points difference between the two teams is at least 2 points (thus, the Golden Set is similar to a tiebreak set in a normal match).