Sevilla decline in performance occurred at the right time, there is no longer a threat for Sevilla in fourth position because Sevilla has one ticket to the Champions League.
It's a bit strange with this sentence
Actually, there is no right time for a decline, a club should continue to improve its performance, or at least maintain its performance. Even if there is a decline, it shouldn't be drastic, and it doesn't happen repeatedly and it doesn't consistently decline. There must be evaluation and improvement again, otherwise, it means something is wrong. We can see that in some matches, Sevilla only had drawn results in sequences, moreover some actually should have chance to win, but it didn't happen. Fortunately, Sevilla is still in the top four so they can still be qualified for UCL. This club must really pay attention on their player performance and strategy for the next season.