Raphael Guerreiro scored twice as Borussia Dortmund pounced on Atletico Madrid's slip-up to advance as Group A winner with a 2-0 victory at Monaco on Tuesday.
Portugal international Guerreiro struck in each half to help the Bundesliga leader dispose of its hapless host and leapfrog Atleti, held to a goalless draw against Club Brugge, thanks to a superior head-to-head record.
Dortmund's largely straightforward win was achieved despite Lucien Favre resting nine members of the team that triumphed 2-1 over Revierderby rival Schalke on the weekend.
Chances were scant after it went ahead in the 15th minute, but top spot and a fifth clean sheet in six Champions League engagements made for a successful trip to the principality.
Favre's changes eroded none of his team's rhythm and it was no surprise when Maximilian Philipp squared for Guerreiro to tap in the opener.
Monaco, though starved of possession and territory, was unfortunate not to be awarded a spot-kick midway through the half, Sofiane Diop's cross striking Abdou Diallo's arm.
It was soon pressed back into defence and ex-Monaco man Diallo should have extended the margin, but the defender steered wide from Guerreiro's first-time ball across the face of goal.
Another chance came and went for Thierry Henry's team moments after the restart as Kamil Glik headed Youri Tielemans' corner over the bar at close range.
It proved its final real hope of avoiding a seventh successive European home defeat at the conclusion of a forgettable continental campaign, Dortmund's decisive three points confirmed with Guerreiro sweeping home Christian Pulisic's cut-back in the 88th minute.
