This time Iran federation disclosed the format sooner, it will be like 2016
Group 1: Serbia Brazil, France, Italy, Poland, US, Russia, Iran, Belgium, Argentina, Bulgaria, Canada
Group 2: Australia, Portugal, Holland, Turkey, Finland, Czech, China, Egypt, Slovakia, Korea, Japan, Slovenia
Group 3: Germany, Greece, Taiwan, Montenegro, Venezuela, Qatar, Spain, Tunisia, Mexico, Kazakhstan, Austria, Estonia
Schedule: (First team is the host)
1st week 2-4 June:
A: Italia, Brazil, Poland, Iran
B: Serbia, US, Canada, Belgium
C: Russia, France, Bulgaria, Argentina
2nd week 9-11 June:
D: Iran, Serbia, Argentina, Belgium
E: Bulgaria, Brazil, Poland, Canada
F: France, Russia, USA, Italia
3rd week 16-18 June:
G: Argentina, Serbia, Brazil, Bulgaria
H: Poland, US, Russia, Iran
I: Belgium, France, Italia, Canada