Fluminense hosted Palmeiras at the Maracana in the first leg.
The winner of the two-leg tie earns a place in the final.
Kickoff was 9:30 PM Brasilia time on Wednesday, Oct 14.
Argentine referee Facundo Tello took charge of the match.
Tello refereed three matches at the 2022 World Cup in Qatar.
Fluminense beat Platense 3-2 on aggregate in the quarterfinal.
Palmeiras won the Libertadores in 1999, 2020, and 2021.
Palmeiras beat LDU Quito in a penalty shootout to reach the semifinal.
Palmeiras had just beaten Corinthians 4-1 in the Paulista derby.
Coach Abel Ferreira missed the first leg through suspension.
The return leg takes place at Nubank Parque in Sao Paulo.
Kickoff is again 9:30 PM Brasilia time. One team reaches the final.
Get the full breakdown, key numbers, and what happens next.
Read on Rive News