Russian Federation defeated Spain 4-3 on penalties after the teams were level at 1-1 after extra time.
"We felt tremendous support. Not just our fans, but the fans of other countries got a sense of this atmosphere and understood that Russians really know how to play football and want to play football", said Akinfeev. Russia, in turn, the next stage will play the victor of Croatia - Denmark.
Russia's victory over Spain is also considered as the third biggest upset in the multicolored history of the World Cup.
It was a painful World Cup exit for Spain and coach Fernando Hierro, who replaced Julen Lopetegui, fired on the eve of the tournament after accepting Real Madrid's offer to be their manager.
The video shows 6ft 4in striker Dzyuba between the sticks at training, pulling off a mirror-image stop to the one team captain Akinfeev made against Spain to win the shootout.
An error in Spain's defense let Russian Federation level in the 41st, after Gerard Pique's raised arm blocked a header by Artyom Dzyuba at a corner. We said because of the World Cup that we need to unite.
Spain look dejected during the 2018 FIFA World Cup Russia Round of 16 match between Spain and Russia at Luzhniki Stadium on July 1, 2018 in Moscow, Russia. "We did everything we could to try to win the match". "Over the whole second half and extra time we were defending our goal and managed it, we were hoping for penalties because Spain are hard to beat".
Russian Federation produced a superb defensive effort to continually frustrate their more highly-fancied opponents at the Luzhniki Stadium in Moscow as Spain seemed incapable of changing their approach. Home supporters with red-white-and-blue wigs and painted faces seemed prepared for an unhappy ending out of Tolstoy or Dostoyevsky, especially after Marco Asensio's free kick ricocheted off a calf of defender Sergei Ignashevich in the 12th minute and past goalkeeper Igor Akinfeev for an own goal.
An own goal from Sergei Ignashevich gave Spain the lead after just 11 minutes, with the Russian veteran diverting the ball into his own net as he wrestled Sergio Ramos to the ground from a free-kick.
The 2010 World Cup champions finished top of Group B, ahead of second-placed Portugal, but were far from convincing in their performances.
Minutes later, Spain were baying for VAR after more wrestling in the box in what was to be the last of the action before the final whistle and penalties.
"It's painful, there's nothing else we can say", Spain captain Sergio Ramos said. Onopko was capped 109 times for Russian Federation from 1992 to 2004.
Buoyed by a partisan crowed, the home team gave it their all and there were exhausted Russian bodies aplenty after a stubborn defensive display took the tie to extra time and penalties.