River Plate would have been hoping to get the Quilmes side that squandered a two-goal lead against ten-man Racing last weekend but found that under caretaker manager Leonardo Lemos the Cerveceros were a more difficult side to breakdown.
After a frustrating opening in the Monumental with the visitors pressing River, the momentum gradually began to build behind Marcelo Gallardo’s side and Quilmes were forced further back.
Unable to find the crucial breakthrough, Gallardo introduced Rodrigo Mora to the attack and within minutes, the Uruguayan proved decisive. A cross to the back post found Sebastián Driussi and his header back across goal left Lucas Alario with the most simple of tap ins.
One goal would likely have been enough but in the final minutes, River broke quickly and Driussi slipped the ball into the path of Alario to slot the ball past César Rigamonti and make certain the victory.
In San Juan, Unión left with a point after a goalless draw with San Martín. The home side perhaps shaded proceedings earlier but it was Unión that should have snatched the win when Federico Anselmo missed from close range late on.