Group A – Cartagena (ESP)
Referees
1. Nikola Jelić CRO (photo)
2. Cedric Pelissier FRA
3. Damian Grabowski POL
4. Dejan Veselič SVN
Timekeeper
Irene Hurtado ESP
Referee Observer
Perry Gautier BEL
Group B – Zagreb (CRO)
Referees
1. Juan Cordero Gallardo ESP
2. Alejandro Martinez Flores ESP
3. Cristiano Santos POR
4. Denys Kutsyi UKR
Timekeeper
Mislav Džeko CRO
Referee Observer
Silvio Borosak SVN
Group C – Lisbon (POR)
Referees
1. Vedran Babic CRO
2. Yiangos Yiangou CYP
3. Dominykas Norkus LTU
4. Petar Radojcic SRB
Timekeeper
Miguel Castilho POR
Referee Observer
Romuald Bourgois FRA
Group D – Palma de Mallorca (ESP)
Referees
1. Grigori Osomkov EST
2. Gabor Kovacs HUN
3. Nicola Manzione ITA
4. Daniel Matkovic SUI
Timekeeper
Diego Martinez Garcia ESP
Referee Observer
Ivan Novak CRO