Racing denied by last-gasp leveller
The competition, which has still to complete its fourth round of matches, also claimed its second coaching victim as Rosario Central were reported to have fired coach Gustavo Alfaro.
Alfaro was sacked at a board meeting on Saturday after the previous day's 3-1 defeat at Banfield left Central with only one point from four games, Argentine media said.
Juan Manuel Llop became the first coaching victim when he quit Racing one week ago after they lost their first three games.
Caruso Lombardi, Llop's outspoken replacement, appeared set for a winning debut when Adriano Lucero headed the Academy ahead early in the second half.
But Nicolas Pavlovich equalised in the second minute of injury-time after a mistake by Racing goalkeeper Gustavo Campagnuolo.
Velez Sarsfield scored four times in a 20-minute spell in the second half to beat Godoy Cruz 4-0 with Maximiliano Moralez scoring twice.
Velez have eight points from four games, one behind leaders Gimnasia-La Plata, who beat Independiente 2-0 on Friday.