Poland defended their world title, defeating the reigning olympic champions Brazil in straight sets at a repeat of the 2014 final. This was Poland's third title overall, and the third time in the last four editions of the World Championship that Brazil and Poland contested the final. This was also the fifth straight World Championship with Brazil reaching at least the final. United States won the 3rd place match, defeating Serbia in four sets.Bartosz Kurek from Poland was elected the MVP.
The first round match between Russia and Tunisia set the new all-time lowest-scoring record in a World Championship set since the new volleyball scoring rules were adopted, with Russia winning the second set by 25–6. The previous record was a 25–8 achieved by United States against Puerto Rico during the 2014 World Championship.
The qualification process was a series of tournaments organised by the five FIVB confederations to decide 21 of the 24 teams which would play in the final tournament, with Italy and Bulgaria qualifying automatically as hosts and Poland also qualifying automatically as the defending champions. All remaining FIVB member associations were eligible to enter the qualifying process.
At first, 150 associations registered teams to compete in the qualification process, but 19 associations withdrew from the qualifying process after they registered and India were suspended and then expelled from taking part in the process as a punishment for internal problems in the India Volleyball Federation.
Of the 24 nations qualified to play at the 2018 World Championship, 20 countries competed at the previous tournament in 2014. Slovenia qualified for the first time. Other teams returning after absences of the last tournament(s) include: Dominican Republic, returning to the finals after their only previous appearance in 1974, Netherlands, who last competed in 2002, and Japan, who missed the 2014 edition.
In the first round, the 24 teams will be spread across four pools of six teams playing in a round-robin system. The top four teams from each pool will advance to the second round. featuring four pools of four teams playing in four cities.
The second round will feature four pools of four teams playing once again in a round-robin system. At the end of the second round matches, the rankings of the four pools will be drawn up taking into account the points scored by each team in the first and second rounds. The four pool-winning teams of the second stage will access the third stage, together with the top two of the second ranked teams.
The six teams competing in the third round will be divided into two three-team pools by a draw. After the matches played once again in a round-robin system, the top two in each pool will qualify for the semifinals and finals.
The third round pool winners play against the runners-up in this round. The semifinals winners advance to compete for the World Championship title. The losers face each other in the third place match.
The opening matches of the 2018 FIVB World Championship, jointly hosted by Italy and Bulgaria held With the presence of the president Sergio Mattarella and Rumen Radev.
Teams were seeded in the first two positions of each pool following the Serpentine system according to their FIVB World Ranking as of 7 July 2017. FIVB reserved the right to seed the hosts as heads of pools A and D regardless of the World Ranking. All teams not seeded were drawn to take other available positions in the remaining lines following the World Ranking. Each pool had no more than three teams from the same confederation. The draw was held in Florence, Italy on 30 November 2017. Rankings as of 7 July 2017 are shown in brackets, except the hosts Italy and Bulgaria who ranked 4th and 14th respectively.
The third round draw was held in Turin, Italy on 24 September 2018. The 1st ranked teams of Pools E and F were drawn in Pools I and Pool J consecutively and the 1st ranked teams of Pools G and H were also drawn in Pools I and J consecutively. The 1st best second team among the four pools was placed in Pool I, while the 2nd best second team among the four pools was placed in Pool J.
If co-hosts Italy and Bulgaria qualify for the second round, they will play in Assago and Sofia respectively regardless of whether they finish first, second or third in their first round pools. The host cities will be adjusted accordingly.
Total number of victories (matches won, matches 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 top four teams in each pool qualified for the second round.
The statistics of each group follows the vis reports P2 and P3. The statistics include 6 volleyball skills; serve, reception, set, spike, block, and dig. The table below shows the top 5 ranked players in each skill plus top scorers at the completion of the tournament. Only players whose teams advanced to the final round are taken in consideration.