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Bartosz Kwolek of Poland plays during the FIVB Volleyball Nations League match between Iran and Poland in Urmia, Iran, June 15, 2019. Iran won 3-2. (Xinhua/Ahmad Halabisaz)

TEHRAN, June 15 (Xinhua) -- Iran beat defending champions Poland 3-2 (25-20, 21-25, 18-25, 25-17, 15-8) at the third competition week of the men's 2019 FIVB Nations League in Urmia city, Iran's West Azarbaijan province on Saturday.

Iran extended their winning run to seven matches as Igor Kolakovic's team had already seized six wins against Italy, Germany, China, Argentina, Japan and Canada, and lost only to Brazil.

Iran will face Russia on Sunday.

The competition is being held between May and July 2019 and the final round will take place in the Credit Union 1 Arena, Chicago, United States.

This is the first edition of the World League or the Nations League to have the Final Round hosted in North America.

The 16 teams compete in a round-robin format with every core team hosting a pool at least once. The teams are divided into four pools of four teams at each week and compete five weeks long, for 120 matches. The top five teams after the preliminary round join the hosts of the final round to compete in the final round.