It will be the fourth time the competition will feature 20 teams after the tournament was expanded in 2013. All previous editions featured 16 teams only.
The competition will take place from September 20 to 29.
The 20 participating teams will be divided into four pools of five teams each and will play a round-robin tournament. The bottom-ranked team in each pool will play classification matches for 17th-20th place in a round-robin system.
The other 16 teams progress to the eighth finals which consist of a playoff (first of Pool A against fourth of Pool B etc). The winners of the playoff matches will advance to the quarterfinals, semifinals and finals to be classified from first to eighth, while the losers of the playoff match will play classification matches, with a similar quarterfinals, semifinals and finals system, to be classified from ninth to 16th.
Cameroon and Nigeria had been due to participate in the event; however, were unable to arrange their visas for Mexico in time and so forfeited their matches.