Athletic Bilbao coach Ernesto Valverde was delighted with victory over Celta Vigo on Friday night.
Athletic won 4-3, with goalkeeper Unai Simon saving a penalty from Celta's Iago Aspas at 3-3.
Gorka Guruzeta scored twice for Athletic, with Alex Berenguer scoring the winner from the spot in the 96th minute.
Valverde said, "It was an absolutely crazy match, a rollercoaster of emotions.
"It could have gone either way, but fortunately we won. We were persistent and got the victory because we went for it.
Valverde added: "Anything could have happened. I haven't recovered from the shock yet, but that's the way it is. Any team could have taken it. We took advantage of one of our best virtues, persistence."