Russia's goalkeeper Igor Akinfeev saves the ball with his foot during the penalty shootout, leading to his team winning the World Cup round of 16 match between Spain and Russia at the Luzhniki Stadium in Moscow on July 1, 2018. /VCG Photo

Russian players celebrate after Spain's Iago Aspas (not pictured) had his penalty saved during the shootout. /VCG Photo

Spain's Gerard Pique concedes a penalty during the first half of the match between Spain and Russia. /VCG Photo

Spain's coach Fernando Hierro kisses defender Sergio Ramos after they lost the penalty shootout against Russia. /VCG Photo

Spain's Andres Iniesta (L), Isco (C) and Nacho (R) look dejected after losing the penalty shootout. Iniesta announced his retirement from the Spanish national football team after the defeat. / VCG Photo

Croatia's Mario Mandzukic (R) celebrates scoring their team's first goal with teammate Ivan Perisic during the match between Croatia and Denmark at Nizhny Novgorod Stadium on July 1, 2018. / VCG Photo

Croatia's Luka Modric (R) has his penalty saved by Denmark's Kasper Schmeichel. / VCG Photo

Luka Modric celebrates with his family following his side’s penalty shootout victory. /VCG Photo

Denmark's players look dejected after being defeated in the penalty shootout at the end of the match. /VCG Photo

Croatia's Danijel Subasic recalls his childhood friend, who has passed away, after winning the match. /VCG Photo