Real Betis midfielder Salva Sevilla regards today's clash with Real Sociedad as the biggest of the season.

Betis sit 13th in the standings, four points above 19th-placed Sociedad and the relegation zone.< p>Sevilla said of Sunday's clash: "We cannot talk about the match against Real Sociedad being a final because there are a lot of games left, but I do think it's the most important game we've had until now."