"The lawsuit is being considered by an arbitration court in Geneva and, unfortunately, our chances to win the case are very slim," Chemezov told RIA Novosti at the opening ceremony of a Russian grenade-launcher assembly facility in Jordan on Thursday.
"We are trying to agree an amicable settlement with Iran, but no progress has been made so far," he said.
According to Iranian officials, Tehran will withdraw its lawsuit only if Russia fulfills the original contract.
The $800-million contract to supply Iran with the missile system was signed at the end of 2007. Moscow was to supply five S-300PMU-1 battalions to Tehran.
However, on September 22, 2010, Russian President Dmitry Medvedev signed a decree cancelling the contract in line with UN Security Council Resolution 1929, which bans supply to Iran of conventional weapons including missiles and missile systems, tanks, attack helicopters, warplanes and ships.
More about:
