The scarlets attacked the Ambassadors and won in Bogotá.
With the victory, the Scarlets are on par in points with Deportivo Cali, which beat Llaneros 3-1 on Saturday at the Palmaseca stadium.
The first chance of the game came with Gisela Robledo who beat her mark and took a right-footed shot that went well over the Embajador goal.
América would score the only goal of the match prior to the end of the first half in a play that began in their own field and there the ball reached Maria Paula Córdoba who launched a cross that closed and finally went inside the guarded albiazul goal by Gabriela Bórquez.
In the second half, Millonarios would try twice with Laura Daniela Garavito, but both chances could not end in shots on goal but rather in approaches.
Then, in the 80th minute, the Ambassadors had the clearest chance to tie it with Lina Marcela Gómez who received a cross from the left and the player headed, but the ball hit the crossbar.
With this result, América will now face Deportivo Cali in the Cali classic while Millonarios will visit Llaneros.