Has there ever been a 8–8 in the Brasileirão?

Never.

It would be a scorigami. Based on the average number of goals in the Brasileirão, the chance of a game ending 8–8 is about 1 in 881,424,964.

Nearby scores

1. 9–7 Never
2. 9–8 Never
3. 9–9 Never
4. 8–7 Never
5. 8–8 Never
6. 7–7 Never