The Rayos came out attacking as they looked to get their season started on the right foot, and in the 14th minute they took the lead. Martín Barragán took a shot from the top of the box that the keeper saved, but the rebound fell for Cristian Calderón, who knocked it home to make it 1-0.
Pumas looked for a quick response and they began to control possession. They had a good chance in the 23rd minute through Felipe Mora, who had a good header with the keeper out of position, but the ball ended up just off the mark.
Despite the visitors having more possession, Necaxa continued to have chances of their own. In the 34th minute, Carlos Guzmán found Barragán in front of goal, but the striker couldn’t get his header on frame.
In the second half, UNAM’s efforts finally paid off in the 76th minute, when Mora headed home the equalizer to make it 1-1.
But it didn’t take long for Necaxa to have the ball in the net again. In the 82nd minute, Guzmán sent in another dangerous cross and substitute Pedro Campos knocked it back across the face of goal where Brian Fernández turned it in at the back post.
After consulting with VAR about a possible offside call, referee Luis Enrique Santander ruled the goal would stand, and Necaxa had the 2-1 lead.
The Rayos kept the ball and slowed the pace of play as they looked to run out the final few minutes. Pumas had one more chance at another equalizer, with another header from Mora, but Hugo González was able to make the save and preserve the lead.
With the 2-1 win, Necaxa reaches three points while Pumas still have one.
Necaxa: Hugo González, Alexis Peña, Carlos Guzmán, José Hibert Ruíz (Fernando González 57′), Luis Gallegos, Cristian Calderón, Ventura Alvarado, Facundo Castro, Martín Barragán (Eduardo Herrera 61′), Brian Fernández, Ángel Sepúlveda (Pedro Campos 78′).
Pumas: Alfredo Saldívar, Alan Mozo, Alejandro Arribas, Luis Quintana, Alan Mendoza (Brian Figueroa 46′), David Cabrera (Kevin Escamilla 89′), Víctor Malcorra, Andrés Iniestra, Martín Rodríguez (Adolfo Hernández 64′), Pablo Barrera, Felipe Mora.