Tehran, Sept 13, IRNA Iran national volleyball team was defeated by its mighty rival Russia on Sunday in 2015 FIVB World Cup underway in Japan. Russia defeated Iran in straight sets (26-24, 25-18 and 25-20). This was Iran's third defeat in the tournament after it was beat by Argentina and Poland. Iran has won its games against Tunisia and Venezuela and has bagged seven points from five games. By IRNA