RIO DE JANEIRO, Dec. 1 (Xinhua) -- Uruguayan midfielder Fabricio Dominguez converted the decisive spot-kick on Tuesday as Racing Club advanced to the Copa Libertadores quarterfinals by eliminating reigning champions Flamengo on penalties.
William Arao's stoppage-time strike cancelled out Leonardo Sigali's 65th-minute opener at the Maracana and forced the match into a penalty shootout after the teams drew 1-1 in Buenos Aires last week.
It marked an unlikely comeback from the Brazilian side, who had been reduced to 10 men just after the hour mark when Rodrigo Caio was shown a straight red card for a bad challenge.
However, Arao went from hero to villain when he missed his spot kick, Flamengo's fourth of the shootout. Dominguez then held his nerve to send the Argentine side into the last eight of South America's top club competition.
Meanwhile, River Plate advanced to the next round after a 1-0 defeat of Athletico Paranaense, a result that gave the Argentine giants a 2-1 win on aggregate.
In Tuesday's only other round of 16 second leg, Santos lost 0-1 at home to LDU Quito but advanced on the away goals rule, having beaten the Ecuadorian side 2-1 in the first leg in Quito.