Spain's defense remained impenetrable as Mikel Merino's goal in the first minute of stoppage time secured a dramatic 1-0 victory over Portugal, advancing Spain to the World Cup quarter-finals. The win, secured at Dallas Stadium, also signaled the likely end of Cristiano Ronaldo's World Cup career.

Spain's watertight defense has yet to concede a goal in five matches, extending their record run of consecutive clean sheets in the tournament to six. This defensive solidity proved crucial in a tactical match with limited clear-cut opportunities.

Cristiano Ronaldo, starting the match despite the recent success of teammate Goncalo Ramos, had a minimal impact. He touched the ball only 19 times during the match, the fewest of any player on the field. Manager Roberto Martinez opted to keep the veteran captain in the lineup, a decision that contrasted with the form of Ramos, who had scored a dramatic winner in the previous round.

Ronaldo's few notable moments included a weak volley that went straight to Spain's goalkeeper Unai Simon and a missed opportunity from a Pedro Neto cross. At 41, Ronaldo's physical presence was evident, but his previous explosive pace and skill were noticeably absent.

Spain's own young star, Lamine Yamal, also experienced a quiet night. Despite his potential, Yamal was uncharacteristically sloppy in possession early on. He did have one clear chance after a turnover, but his shot was saved by Portugal's goalkeeper Diogo Costa, with the rebound also saved.

A Tactical Battle

The match largely unfolded as a strategic contest between two possession-oriented teams. Early on, Spain's Mikel Oyarzabal missed an opportunity to score after being put through on goal by Dani Olmo. Ronaldo's first significant involvement was a shot directly at Simon.

Portugal came closer in the 37th minute when Joao Felix's header deflected off Simon, and Ronaldo's subsequent attempt to turn the ball home forced an acrobatic save. Shortly before halftime, Nuno Mendes hit the woodwork with a long-range effort.

It was by no means a classic at Dallas Stadium as the two teams played out a real chess match

The second half mirrored the first in its scarcity of chances until late in the game. Spain's defensive unit, marshaled by Rodri and featuring Aymeric Laporte and Pau Cubarsi, with Pedro Porro and Marc Cucurella on the flanks, has been a standout feature of their tournament run.

Spain's goalkeeper Unai Simon made only three saves throughout the match, contributing to their remarkable defensive record. The team's ability to shut out opponents has surpassed previous tournament records.

Spain have kept a record six consecutive clean sheets at the World Cup after another shutout

Decisive Goal

The decisive moment came when substitute Ferran Torres received the ball and passed to Merino, who broke into the box. Merino then calmly slotted the ball past Diogo Costa to secure Spain's victory and their place in the next round. The goal was set up by a combination of substitutes, with Torres playing a key role in the buildup.

Mikel Merino's last-gasp strike earned Spain a 1-0 win over Portugal in the World Cup last 16

Following Merino's goal, Portugal attempted to equalize but their efforts were insufficient, leading to their exit from the tournament. Ronaldo was seen in tears at full-time, marking a somber end to his World Cup journey.

Ronaldo looked a shadow of his former self as he departed on the most miserable of lows