Estádio Nicolau Alayon, also known as Estádio Comendador Sousa, is a football (soccer) stadium located in the Brazilian city of São Paulo, São Paulo state. It is the home stadium of Brazilian football club Nacional Atlético Clube, also known as Nacional (SP), and Audax São Paulo Esporte Clube. It has a maximum capacity of 9,660. The stadium is named after the Uruguayan Nicolau Alayon, who was Nacional's president during the stadium's construction. The stadium is nicknamed Comendador Sousa after the street where it is located in.
The stadium was inaugurated on May 14, 1938, when Corinthians beat Nacional 2-1. The first goal of the stadium was scored by Nacional's Carlos Leite. The stadium's attendance record currently stands at 22,000, set on February 21, 1970, when Nacional beat São Paulo 1-0.