Real Betis coach Gus Poyet is under pressure after their 6-1 hammering by Real Madrid.
AS says the defeat was the biggest Betis have suffered at home in their history.
Poyet has already said there will changes for the match against Osasuna and the defensive system will be the primary modification as he seeks to plug the holes in his back line.
Betis' back line continues to look extremely vulnerable and has now conceded the second-highest number of goals in the division this season, 18. Only rock bottom Granada have shipped more.