Uruguayan referee Andres Cunha (R) speaks with Iran’s midfielder Ehsan Haji Safi during the Russia 2018 World Cup Group B football match between Iran and Spain at the Kazan Arena in Kazan on June 20, 2018. / AFP PHOTO /

Spain beat a battling Iran 1-0 thanks to a deflected Diego Costa goal, putting them on course to qualify for the last 16 of the World Cup.

Iran had a goal from Mehdi Taremi disallowed for offside in the second half.

Uruguayan referee Andres Cunha (R) speaks with Iran’s midfielder Ehsan Haji Safi during the Russia 2018 World Cup Group B football match between Iran and Spain at the Kazan Arena in Kazan on June 20, 2018. / AFP PHOTO /