Six-time World Grand Prix winners, United States won the inaugural edition, defeating Turkey in five sets on the final.[4] This was Turkey's first ever final on a senior world-level premier competition (World Championship, World Cup, Summer Olympic Games and the aforementioned Grand Prix). Reigning Olympic champions and host nation, China defeated 12-time Grand Prix champions Brazil in straight sets for the bronze medal.[5]Michelle Bartsch-Hackley from USA was elected the MVP.[6][7]
Sixteen teams qualified for the competition. Twelve of them qualified as core teams which cannot face relegation. Other four teams were selected as challenger teams which could be relegated from the tournament.
The 16 teams compete in a round-robin format with every core team hosting a pool at least once. The teams are divided into 4 pools of 4 teams at each week and compete five weeks long, with a total of 120 matches. The top five teams after the league round join the hosts of the final round to compete in the final round.[1] The relegation takes in consideration only the 4 challenger teams and the last ranked challenger team will be excluded from the 2019 Nations League. The winners of the Challenger Cup will qualify for the next edition as a challenger team.[9]
Final round
The six qualified teams play in 2 pools of 3 teams in round-robin. The top 2 teams of each pool qualify for the semifinals. The pool winners play against the runners-up in this round. The semifinals winners advance to compete for the Nations League title. The losers face in the third place match.
Pools composition
The overview of pools was released on February 16, 2018.[2]
Total number of victories (matches won, matched lost)
In the event of a tie, the following first tiebreaker will apply: The teams will be ranked by the most point gained per match as follows:
Match won 3–0 or 3–1: 3 points for the winner, 0 points for the loser
Match won 3–2: 2 points for the winner, 1 point for the loser
Match forfeited: 3 points for the winner, 0 points (0–25, 0–25, 0–25) for the loser
If teams are still tied after examining the number of victories and points gained, then the FIVB will examine the results in order to break the tie in the following order:
Set quotient: if two or more teams are tied on the number of points gained, they will be ranked by the quotient resulting from the division of the number of all set won by the number of all sets lost.
Points quotient: if the tie persists based on the set quotient, the teams will be ranked by the quotient resulting from the division of all points scored by the total of points lost during all sets.
If the tie persists based on the point quotient, the tie will be broken based on the team that won the match of the Round Robin Phase between the tied teams. When the tie in point quotient is between three or more teams, these teams ranked taking into consideration only the matches involving the teams in question.
The 16 national teams involved in the tournament were required to register a squad of 21 players, which every week's 14-player roster must be selected from. Each country must declare its 14-player roster two days before the start of each week's round-robin competition.