The chance is very slim for Betis to taken over 4th position from Sevilla especially Sevilla is more comfortable to faced Bilbao next weekend because to secured their position on the top 4 Sevilla only needed draw result and i think the chance is wide open although from 4 recent matches Sevilla cannot be win but i think they can ended this match at least with no lose so my prediction Sevilla will taken over last spot for champion league zone than Betis
Whatever the result of the match that gets by sevilla in the match against bilbao later, I think it will no longer affect their position in the La Liga standings, so far sevilla have accumulated 67 points and are only 3 points distance Betis who are below them, even though sevilla later losing against bilbao and Betis can win big against Madrid later, so that it makes both points equal to 67 but still sevilla will still qualify for the champions league next season because this season sevilla won head to head from Betis.
Sevilla need not worry they might still have a chance to keep pushing Atletico Madrid by taking 2 goals. Although it won't last long. The opportunity to go to the Champions League next season is also not very profitable for Sevilla. The remaining matches that are only able to survive in the top 5 are already much better for Sevilla.