Two special goals lit up the Nou Camp as Barcelona, aiming to reach the Champions League semi-finals for the seventh year in a row, shared a 1-1 draw with Spanish rivals Atletico Madrid.
Brazilian substitute Diego fired an unstoppable bullet of a shot into the top corner of the net from 30 metres to open the scoring for La Liga leaders Atletico in the 56th minute of the quarter-final first leg.
Andres Iniesta then spotted a gap in the visiting defence 15 minutes later and threaded the perfect through ball for Diego's compatriot Neymar to beat goalkeeper Thibaut Courtois with a curling right-foot effort from a tight angle.
"We got a good result but the tie is still open," Atletico coach Diego Simeone told a news conference.
"It was all down to enormous work from the team. It was a game of different styles and each team fights with the armoury they have."