What happened: Substitute Gonçalo Ramos rose to head Portugal 2-1 ahead of Croatia in the 94th minute, meeting a cross from Rafael Leão. Cristiano Ronaldo had drawn Portugal level from the penalty spot in the 68th minute, after Renato Veiga was fouled by Marin Pongračić inside the box, cancelling out Ivan Perišić's second-half opener. A stoppage-time Croatia equalizer from Joško Gvardiol has been ruled out for offside after a VAR review flagged a touch by Igor Matanović in the buildup.
Why it matters: The Round-of-16 tie carries a quarterfinal place on the line, with Spain waiting after getting past Austria. Croatia, chasing a third consecutive World Cup semifinal, are pressing to force the game level in its dying moments. Ramos, introduced by Roberto Martínez around the hour mark, has swung the momentum with Ronaldo off the field.
By the numbers: Ronaldo's 68th-minute penalty is his first goal in the knockout rounds across his sixth World Cup appearance. The disallowed Croatia goal turned on ball-tracking sensor data and VAR, which registered a touch off Matanović that placed Mario Pašalić offside. Form entering the match: Portugal 1-2 this season, Croatia 2-1 with two straight wins.
What to watch: Watch whether the final stoppage-time seconds resume after objects were thrown onto the field from the stands, and whether Croatia can manufacture another chance before the whistle.