Yeah I think the same ideas with you trough Sevilla left five points with Real Madrid but still has one match more, if success win from left one match they will reduce only three points with Real Madrid and make more competitive. Depend how Sevilla can playing well on left match because right now just possibility for La Liga trophy is Sevilla and Real Madrid, Barcelona and Atletico Madrid missing far points from Real Madrid each other left than 16 points, although have 18 match I think not easy for Barcelona and Atletico Madrid getting close points with Real Madrid or Sevilla, just take way how to get four top position only as possibility for both team.
Sevilla has a great opportunity to continue to pursue Madrid. What makes me not believe is the decline in performance from Atletico. I think Atletico has a bigger chance than Sevilla. but Sevilla played more consistently.
Madrid seems to have a few games in their favor to leave Sevilla. hopefully, they can still be consistent to keep getting points even though there are several matches with a fairly solid schedule.