CR Flamengo secured a narrow but vital 1-0 home victory over Internacional RS in the first leg of their CONMEBOL Copa Libertadores quarter-final clash at the Maracanã on August 14, 2025. A solitary second-half goal gave Flamengo a slender advantage to take into the away leg, in a match where their attacking prowess was ultimately rewarded after sustained pressure. The match process saw Flamengo control possession from the outset, creating several half-chances but being frustrated by a resolute Internacional defense and their excellent goalkeeper. The deadlock was finally broken around the hour mark when a Flamengo winger cut inside and unleashed a low drive that found the bottom corner, sending the home crowd into a frenzy. Internacional grew into the game after conceding and had a golden opportunity to equalize late on, but their striker headed over from close range. The standout performance came from Flamengo's midfield orchestrator, who dictated the tempo and provided the assist for the winning goal. This result puts Flamengo in the driver's seat for the tie, though the single-goal margin leaves Internacional with a very achievable task in the return leg. Flamengo's manager praised his team's patience, while Internacional's coach remained optimistic, pointing to the missed chance as proof his team can threaten in Porto Alegre. The lineups featured Flamengo's full-strength attacking trio against Internacional's compact and disciplined 4-4-2 formation.