Inside look at the Copa semi-final first leg

Inside look at the Copa semi-final first leg

San Mames will decide the tie on April 4 after Osasuna's narrow win this Wednesday

Pamplona and El Sadar were the backdrop for a special Copa del Rey semi-final. The first battle of the derby between Osasuna and Athletic ended with a narrow victory for Los Rojillos on a record-breaking night as El Sadar registered its best attendance since the stadium's renovation.

Athleticzales, who never fail to turn up for Los Leones' away trips, supported the team body and soul in the stands. Before that, they made their presence felt in the streets Navarra's capital.