Mikel Merino scored a stoppage-time goal on Monday to lead Spain to a 1-0 victory over Portugal in the World Cup round of 16 [1].

The result is significant because it sends Spain into the quarter-finals and marks the end of Cristiano Ronaldo's career in the FIFA World Cup [2].

Merino entered the match as a substitute and delivered the decisive finish in the 91st minute [3]. The goal occurred during the first minute of added time, breaking a scoreless deadlock and securing the win for the Spanish side [3].

Spain head coach Luis de la Fuente praised the performance following the match. The victory ensures Spain continues its progression in the tournament while eliminating one of the most decorated players in football history [1].

Portugal struggled to find an equalizer in the final moments of the match. The defeat concludes a long World Cup tenure for Ronaldo, who departs the tournament following the loss to Spain [2].

Spain's defensive effort contributed to the record-setting shutout against the Portuguese offense [4]. The team now prepares for the quarter-finals with momentum from the late-game victory.

Mikel Merino scored a stoppage-time goal on Monday to lead Spain to a 1-0 victory over Portugal

Spain's advancement to the quarter-finals reinforces their status as a tournament favorite through tactical depth and late-game execution. Simultaneously, the exit of Cristiano Ronaldo signals a definitive generational shift in international football, removing one of the era's most influential figures from the world's largest sporting stage.