Sergio Aguero sealed an unconvincing Argentina side's passage into the quarter-finals of the Copa America as they saw off Qatar in Porto Alegre.Aguero's late right-foot drive from 15 yards sealed a 2-0 win after Lautaro Martinez netted in the third minute.Bassam Al-Rawi, whose misplaced pass had allowed Martinez to score, hit the post for Qatar, who are eliminated.Lionel Scaloni's side finish second in Group B behind Colombia, and will face Venezuela in the last eight.Meanwhile, group winners Colombia's 1-0 win over third-placed Paraguay ensured Argentina's progress.A 2-0 defeat by Colombia and a 1-1 draw with Paraguay had meant that Argentina had to beat the group's bottom side Qatar to a avoid a humiliating group-stage exit from the competition.However, it was far from a comfortable evening for the two-time World Cup winners against the 2022 World Cup hosts, who are ranked 55th in the world - despite making the perfect start, with 21-year-old Inter Milan forward Martinez scoring so early.Manchester City forward Aguero and Barcelona's Lionel Messi, who produced an underwhelming performance, both missed excellent opportunities while Qatar threatened on the counter-attack until Aguero's late intervention.Argentina now face Venezuela in their quarter-final on Friday, 28 June at the Maracana in Rio de Janeiro.