League Position
1/20National I Division Championship · 56 pts after matchday 31
1/20National I Division Championship · 56 pts after matchday 31The Kit–No kit on file for 1990/91
Around the Date
| # | Club | P | W | D | L | GD | Pts |
|---|---|---|---|---|---|---|---|
| 1 |  SL Benfica | 31 | 26 | 4 | 1 | +54 | 56 |
| 2 |  FC Porto | 31 | 25 | 5 | 1 | +45 | 55 |
| 3 |  Sporting CP | 31 | 22 | 5 | 4 | +35 | 49 |
| 4 |  Boavista FC | 31 | 12 | 10 | 9 | +5 | 34 |
| 5 |  Beira-Mar | 31 | 10 | 12 | 9 | +1 | 32 |
| 6 |  Marítimo | 31 | 11 | 8 | 12 | -6 | 30 |
| 7 |  FC Penafiel | 31 | 11 | 7 | 13 | -10 | 29 |
| 8 |  Vitória SC | 31 | 10 | 9 | 12 | -3 | 29 |
| 9 |  SC Salgueiros | 31 | 10 | 9 | 12 | -18 | 29 |
| 10 |  Tirsense | 31 | 9 | 11 | 11 | -4 | 29 |
| 11 |  Farense | 31 | 12 | 4 | 15 | -1 | 28 |
| 12 |  SC Braga | 31 | 10 | 6 | 15 | -8 | 26 |
| 13 |  GD Chaves | 31 | 7 | 12 | 12 | -6 | 26 |
| 14 |  Gil Vicente | 31 | 8 | 10 | 13 | -9 | 26 |
| 15 |  União Madeira | 31 | 6 | 13 | 12 | -21 | 25 |
| 16 |  Vitória FC | 31 | 8 | 9 | 14 | -3 | 25 |
| 17 |  Est. Amadora | 31 | 7 | 11 | 13 | -7 | 25 |
| 18 |  FC Famalicão | 31 | 7 | 9 | 15 | -13 | 23 |
| 19 |  Nacional | 31 | 6 | 10 | 15 | -21 | 22 |
| 20 |  Belenenses | 31 | 7 | 8 | 16 | -10 | 22 |
After matchday 31, the last one completed by this day.
Squad 25
1Neno12SilvinoDias GraçaManuel Bento2António Veloso2Samuel Quina3Ricardo Gomes4William5Paulo Madeira15José CarlosFernando Mendes5Paulo Sousa6Jonas Thern7Vítor Paneira8Pacheco10ValdoErwin SánchezHernâni NevesRui BentoStefan Schwarz9Rui Águas11César Brito11Mats Magnusson14IsaíasVata
Already gone by then: Lima
The squad registered for the season, less the players who had not arrived yet or had already left by this day according to our transfer records. Appearances and goals count official matches only. Line-ups and goal records before 2016/17 are incomplete, so older numbers can be low.