Costa scored Atlético's equalising goal in the Copa del Rey final clash against city rivals Real Madrid on 17 May 2013, contributing to the 2–1 triumph – the first in 25 games in a streak stretching back to 1999 – and the tenth win in the tournament, confirmed by Miranda's extra-time header. He and opponent Cristiano Ronaldo had gone into the match as joint top scorers in the tournament, and thus Costa's eighth goal made him the top scorer.