They have to lose 3 matches to have big risk of losing a position in top four of La Liga. Chance for Athletic Club to surpass Girona in last several matches is not actually too high. Girona have more scored goals and better goal difference than Athletic Club too. They have many advantages to defend their position and Champions League is not too far.
Now Girona maintains 3 position with quite lot of points difference from Atletico Madrid and only has difference of 2 points from Barcelona which is currently in 2 place, there is still possibility that Girona can surpass Barcelona this season.
2 points is not big difference and while Barcelona cannot appear with stable performance in the future it could cause them to lose 2 place, Girona will definitely try to catch up to fight for runners-up.
From the remaining matches, it is clear that Real Madrid has confirmed its comfortable position at the top of the standings to become La Liga champions and the battle for position is taking place for runners-up between Barcelona and Girona.
For Atletico Madrid itself, the real threat is Bilbao, clearly difference of 2 points can make Bilbao take over the top 4 position if Atletico Madrid is careless and makes mistake.
It just that the competition now only takes place between 2 teams and this is less competitive competition, unlike last season.