Conmebol announces Piero Maza as referee for the Atlético-MG x Lanús final in Asunción

Piero Maza, a 41-year-old Chilean referee, referees the match on November 22nd at the Defensores del Chaco stadium, in Asunción, Paraguay. The decision is made due to the lineup of teams for the unique confrontation.

The final uses technologies such as semi-automatic offside and goal line, applied in recent decisions by the entity. Atlético-MG is seeking its second title in the competition.

• Referee: Piero Maza (Chile)
• Assistants: Miguel Rocha and Alejandro Molina (Chile)
• Fourth referee: Carlos Betancur (Colombia)
• VAR: Juan Lara (Chile)

Chilean Piero Maza will be the referee of the South American final between Atlético-MG and Lanús.

📸 Cesar Greco/SEP pic.twitter.com/pAK6GEntB1

— Planeta do Futebol 🌎 (@futebol_info) November 14, 2025

Referee’s history with Galo

Piero Maza took charge of two Atlético-MG matches in Conmebol competitions.

The Minas Gerais club remains undefeated under the Chilean’s whistle, with a draw against Millonarios in 2023 and a victory over Rosário Central in 2024.

Both games took place in the Libertadores.

Technologies in decision making

Semi-automatic impediment speeds up irregular position reviews.

The tool reduces analysis time for doubtful bids. Goal line technology detects whether the ball goes completely over the mark.

These systems debuted in continental finals in 2024.

Full officiating team

Assistants Miguel Rocha and Alejandro Molina work on the flags.

Juan Lara operates the VAR for on-field reviews.

Carlos Betancur serves as fourth referee in the substitution.

The Chilean team predominates in the conduct of the game.

Preparation for confrontation

Atlético-MG faces Lanús in search of an unprecedented title for the Argentine in the competition.

The match marks the mandatory use of technologies in the South American finals.

Conmebol adopts FIFA standards to standardize decisions.

Stadium details

Defensores del Chaco hosts the final with a capacity of 42 thousand fans.

The venue has previously hosted international events.

Assunção centralizes logistics for South American teams.

Invincibility of Minas Gerais

Atlético-MG accumulates positive results with Maza.

Draw in 2023 occurred in the group stage of the Libertadores.

Vitória in 2024 advanced the team to the round of 16.