The first leg of the Copa del Rey semi-final between Celta Vigo and Alaves at Balaidos ended goalless.
Both sides had opportunities to gain a first leg advantage in Galicia, but the stalemate means there is still all to play for in next week's return leg.
Iago Aspas had the home team's best chance, but his close range effort following a corner was superbly saved by Alaves keeper Fernando Pacheco.
The winner of the tie will advance to the final, where they will face the winners of the other semi-final between Atletico Madrid and Barcelona.
Neither Celta nor Alaves have ever won the Copa del Rey, though the former have been runners-up on three occasions.