The reaction to Vida's goal was nearly one of shock as it crept through the legs of teammate Vedran Corluka and into the bottom corner, with the home crowd left temporarily silent and in disbelief as the goalscorer reeled away and ripped off his shirt in celebration.
The winners will play England in the semi-finals at the Luzhniki Stadium in Moscow on Wednesday. Igor Akinfeev was more than once called into action in the opening moments and each time displayed his class that was so apparent versus Spain to keep Ante Rebic's effort out. Both Luca Modric & Ivan Rakitic didn't see enough of the ball against Denmark, and the Croatia boss may instruct his star midfielders to drop slightly deeper to start to dictate the play.
- There were three headed goals in this match - the most in a World Cup match since Germany 8-0 Saudi Arabia in 2002 (five). Croatia equalized with Andrej Kramaric's header near halftime.
Croatia continued to pass and probe, and on the hour-mark, Inter Milan winger Ivan Perisic went close, hitting the post when he probably should have scored.
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Croatia were quick to respond, levelling things up just before half time.
Subasic appeared to sustain a hamstring injury when stopping a deflected Aleksandr Erokhin cross go out for a corner, though he recovered to bat away Smolov's drive from an acute angle in stoppage time.
Yuri Gazinskiy became Russia's third substitutes, coming in for Dzyuba, but Croatia almost ran into trouble after making two more subs, Josip Pivaric and Mateo Kovacic on for Ivan Strinic and Kramaric.
Akinfeev was helpless as Vida's header sneaked through a body of players into the bottom-right corner of the net from a corner on the right.
Croatia players celebrate after beating Russian Federation on post-match penalties during their Russian Federation 2018 World Cup quarter-final match at the Fisht Stadium in Sochi on July 7, 2018. Striker Mario Mandzukic ran unchallenged into the penalty area and chipped a low ball back into the centre where the unmarked Kramaric scored with a glancing header.
Russia's unlikely run came to an end at the quarter-final stage as Croatia once again progressed via a shoot-out.
Having knocked out Spain on penalties in the previous round, Russia, 70th in the Federation Internationale de Football Association rankings, again defied the odds to take 20th ranked Croatia to a shootout with a 2-2 draw after extra time but on this occasion their marksmanship deserted them.