Athletic Bilbao coach Ernesto Valverde felt they could've done much more this season.
Valverde admits he was pleased with the quality of his squad, but believes they underachieved.
"In my seven years here, I can't remember a season in which I've had the feeling we could've won all 21 fixtures at home," he said.
"We've played some great matches at home, but with little reward. We weren't always as clinical as we should've been.
"We fought to get into Europe from the first minute until the 90th minute, from the first match until the last.
"When it comes down to the final tally and you don't make it by the narrowest of margins, there's always a point of frustration. But we can't be too tempted to focus on the negative side and not acknowledge all the things we have done well.
"There are certain moments of play when we need to be calmer and sharper, especially in the closing stages of a match, where we've let slip many valuable points this season."
