Napoli's Champions League hope hanging on the balance after they failed to grab maximum result on their home leg tie against Athletic Bilbao.
Staging the first leg tie at San Paolo, Napoli were eager to get themselves ahead, but couldn't finish any of their early chances.
Bilbao eventually got themselves into the game and it was them that got in front thanks to an effort from Iker Muniain on 41 minutes.
Trailing by a goal urged Partenopei to push further forward as they're not keen on getting humiliated in front of their fans.
The home side finally got back on level terms as Gonzalo Higuain equalized on 68 minutes to make it 1-1.
No more goals were scored afterwards as both sides still have everything to play for in the second meeting.