Real Sociedad climbed to the top of La Liga on Friday after a 1-1 draw against bottom side Leganes.
Mikel Merino gave La Real a 63rd-minute lead, only for Youssef En-Nesyri to head the equaliser with 12 minutes remaining.
Barcelona, Real Madrid, Atletico Madrid, Sevilla or Granada can claim top spot this weekend if results fall in their favour.
La Liga Table (Played, Goal Difference, Points)
1. Sociedad: 13, 7, 23
2. Barcelona: 11, 15, 22
3. Real Madrid: 11, 12, 22
4. Atletico Madrid: 12, 5, 21
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