Yes, in that match the only goal scored was Alex Berenguer's penalty kick in the 25th minute against Atletico Madrid. So when the referee blew the long whistle for the second half, Atletico Madrid had not been able to equalize and had to accept defeat in the first leg against Bilbao.
However, in my opinion, in this match the Atletico Madrid players played quite well. The reason is, Atletico Madrid players created many opportunities in the first half and also in the second half. But unfortunately, none of these opportunities resulted in a goal. Maybe in this first leg Atletico Madrid could be said to be unlucky even though they were playing at home. Because if you look at the performance of the two teams, in my opinion Atletico Madrid is superior to Bilbao. However, one mistake resulted in Bilbao being awarded a penalty kick, which turned out to be Bilbao's patented goal.
However, in the second leg, I am very optimistic that Atletico Madrid will definitely be able to beat Bilbao. The reason is that in the second leg, Atletico Madrid will definitely correct the mistakes made in the first leg and will definitely maximize the opportunities that exist. Even though in the second leg Bilbao will play at home, and will be calmer because they are already 1 goal ahead, this is not a big guarantee that Bilbao can win the match. So in my personal opinion, Atletico Madrid can definitely beat Bilbao in the second leg and in essence can reach the Copa Del Rey final.
And regarding the competition between Sociedad and Mallorca, I also agree that Sociedad is a strong candidate who can advance to the Copa Del Rey final.
In a few recent games, Bilbao have been able to show strength and charisma to winning games. They've safely been tagged underrated and not really focused on but looking deep, they're making waves. Even their betting odds would speak for them. They are a team practically growing into a La Liga threat club.
They've had competitive games and ensured they kept up their pace making the result of the game be either to their favour or a fair draw.
Girona and Vallecano are a testament of the fact. It's good how Spanish teams are starting to face the uprising of the beat and live through letting just 3 teams be the talk about of the league. Currently the likes of Girona, Real Sociedad too and definitely Bilbao are outshining in their deeds and it's amazing to watch how football has become even more interesting this season in the Spanish league.