Has there ever been a 10–0 in the Primeira Liga?

Yes, 1 time.

The only time: February 10, 2019, SL Benfica beat Nacional da Madeira (SL Benfica 10–0 Nacional da Madeira).

Nearby scores

1. 11–0 Never
2. 11–1 Never
3. 10–0 1 time
4. 10–1 Never
5. 9–0 Never
6. 9–1 Never