There are still many matches that will be played until the end of the season and thus, if for example Bilbao loses by Real Madrid and Atletico manages to beat Villarreal and that will make Atletico return to fourth place overtaking Bilbao. But, if in the next matches Atletico get bad results again then of course Bilbao will again overtake Atletico because after all, this season Bilbao really has a good performance compared to previous seasons. Therefore, because this season Bilbao has a good trend, then I personally believe that Bilbao will manage to finish in the top four. Also, although Bilbao will play away against Real Madrid later, but I am still very confident that Bilbao will not be defeated by Real Madrid at the Santiago Bernabeu.
Athletico Madrid just needs to do one thing to overtake Athletic Bilbao in the fourth position in the La Liga table, which is beating Villarreal. If Athletico Madrid beats Villarreal, they will gain their position back because Athletic Bilbao cannot win against Real Madrid in Santiago Bernabeu. This could be the only opportunity Athletico Madrid can get to overtake Athletic Bilbao in the La Liga table this season.
With the current level of performance and remaining schedule it is looking not easy to have fourth spot for the Atlético Madrid because Athletic Bilbao is also giving his best for taking this and their performance level is also impressive for the real time spots we have to wait until last round of this season because top three spots are already fixed for the teams which are currently having them and their performance is also good even any worst situation can bring good changes, but things are looking entertaining for the last few rounds of this season for the all top teams.
Atlético is also involved in last rounds of the Champions League which is also looking good for them to have chance for the last four which could be bonus after beating Inter Milan and going through for the last rounds of this season in this elite event.