Portugal: Tier 1 - 1980-81
| Benfica beat Penafiel 6-0 (H) on 14 Sep 1980 |
| Penafiel beat Os Belenenses 1-0 (H) on 19 Oct 1980 |
| Os Belenenses beat Vitória Guimarães 1-0 (H) on 21 Sep 1980 |
| Vitória Guimarães beat Académico Viseu 2-0 (H) on 24 Aug 1980 |
| Académico Viseu beat Vitória Setúbal 1-0 (H) on 14 Sep 1980 |
| Vitória Setúbal beat Porto 1-0 (H) on 7 Sep 1980 |
| Porto beat Sporting CP 2-1 (A) on 24 Aug 1980 |
| Sporting CP beat CS Marítimo 3-1 (H) on 7 Sep 1980 |
| CS Marítimo beat SC Espinho 2-1 (H) on 28 Sep 1980 |
| SC Espinho beat Portimonense 1-0 (H) on 24 Aug 1980 |
| Portimonense beat Boavista 5-1 (H) on 31 Aug 1980 |
| Boavista beat Amora 2-1 (H) on 7 Sep 1980 |
| Amora beat Varzim 1-0 (H) on 14 Sep 1980 |
| Varzim beat Braga 2-0 (H) on 24 Aug 1980 |
| Braga beat Académica Coimbra 2-1 (A) on 28 Sep 1980 |
FLP: Thick arrows show the earliest chain of wins that passes through every team.