N | 1931-05-31 | Athletic Bilbao | 4-0 | Real Unión | VF | ||||
U | 1931-05-24 | Real Unión | 2-2 | Athletic Bilbao | VF | ||||
U | 1931-05-17 | Sporting Gijón | 0-0 | Real Unión | 1/8 | ||||
S | 1931-05-10 | Real Unión | 4-1 | Sporting Gijón | 1/8 | ||||
U | 1931-04-26 | Celta de Vigo | 1-1 | Real Unión | 1/16 | ||||
S | 1931-04-12 | Real Unión | 3-1 | Celta de Vigo | 1/16 |