The 27-year-old has hailed his own strike in the semi-final tie against Sporting Lisbon as the most important of his career, and thanks the San Mames crowd which spurred them on
The Spain striker scored the decisive goal in the 4-3 aggregate win, sealing Marcelo Bielsa's men's progression to the Bucharest showpiece, and the 27-year-old was quick to voice his pride at playing his part in an historic night for the club.
"We have made history, and hopefully we can continue doing so," he told Canal+ in the wake of the game. "It's great to reach the final, and hopefully we can win it.
"This is the most important moment in my life. It's the first time I wanted to cry on a football pitch. It was my most important goal.
The Basque side were buoyed on by the ever-passionate San Mames faithful, and the 27-year-old went on to thank the fans for their contribution to the victory.
"I'm speechless. It was incredible from the pitch. You don't see this anywhere else. It was amazing."
Athletic Bilbao will take on fellow Liga side Atletico Madrid in the Romanian capital on May 9 at 20.45CET.