Real Madrid's chances of remaining in the top 4, now depends on them winning against Real Betis.
They have about 5 matches left for this LA Liga league to end. Their chances of winning the league relies on how they perform in the matches left. Among the last matches, they have to play against Sevilla, which is going to be a tough one.
They also have match to play against Chelsea in the semi-final of Champion League which is their next match.
Yes Madrid have to win in all the remaining matches and against Sevilla I don't think it's difficult because they already did it against Barcelona
On the other hand, Atletico have a difficult game against Barcelona on May 8, no other option win or a draw is enough