They sit with the best chance of claiming the title, coming into the tournament in red-hot form with back-to-back victories in Abu Dhabi and Mexico City.

Riga also finished second in Debrecen behind Serbian unit Ub, who also won in Montreal and took silver in Abu Dhabi and Lausanne.

Amsterdam from The Netherlands have been on the podium three times, including a victory in Doha.

Puerto Rico side San Juan won in Lausanne and the other World Tour winner this year were Jeddah at the Prague event.

Serbian side Liman, who were runners-up last year, have made the podium on two occasions – as have Antwerp from Belgium.

Šakiai from Lithuania, Gagarin from Russia, Princeton from the United States, Graz from Austria and Lausanne from Switzerland complete the 12-team line-up.

Top sides from last year Novi Sad of Serbia, NY Harlem of the US and Utena from Lithuania all missed out.

Competition starts tomorrow with four pools of three, which will see the bottom teams eliminated from the tournament.

From there, it is a straight-knockout starting from the quarter-finals all the way to the final.

Riga face Princeton and Lausanne in Pool A.

Pool B features three World Tour winners from this year – Ub, Jeddah and San Juan.

Liman and Šakiai are joined by Gagarin in Pool C, and an all-European group of Amsterdam, Antwerp and Graz make up Pool D.