Copa Libertadores nights in Tucumán are always lively affairs and there could be some more to come after Atlético secured the victory needed over Peñarol to remain in with a chance of qualifying for the knockout stages.
After a tight first half, Fernanzo Zampedri eventually broke the deadlock with a close range header, his fifth of the tournament only adding to his burgeoning reputation.
Minutes later it was two when David Barbona’s attempted olímpico came back off the crossbar and in the confusion allowed Leandro González to nod in.
El Decano sensed victory but Peñarol ensured an anxious finish when Gastón Rodríguez pulled one back. However, Atleti held on and will likely need a result away to Palmeiras in a couple of weeks to book their place in the latter stages.
Estudiantes, meanwhile, are on the brink of a first round exit after a damaging 4-1 defeat to champions Atlético Nacional in Medellín.
It was a first win of the tournament for the Colombians but has left Estudiantes needing something of a miracle to reach the next round.
Mateus Uribe rifled the home side ahead and Dayro Moreno’s strike just before half time left El Pincha with a mountain to climb after the break. Things only got worse a minute into the second half when Andres Ibargüen tapped in a third and although a Farid Diaz own goal reduced the deficit, Macnelly Torres wrapped it up with a fourth.
Juan Sebastián Verón struggled badly aside from a free kick which rattled the woodwork and his brief return could be over soon if Estudiantes cannot get a result against Barcelona in Guayaquil in two weeks.