Ernesto Valverde was taking the positives after his Athletic Bilbao side lost 2-1 at home to Espanyol on Sunday.
Los Leones missed the chance to extend their lead in fourth place after goals from Sergio Garcia and Diego Colotto downed them at San Mames.
“Sometimes losing a game is good just to show you how difficult this League is,” he told a Press conference.
“When you’re winning at home, it seems that anyone who comes here is going to break down and lost – but that’s not so.
“They made it very difficult for us and we struggled to get in goal scoring areas.
“The draw on Monday and the loss here – it just shows you how difficult it is in Spain.
“This is a long and complicated season, and it won’t be easy to achieve our goal.”