Neymar's composed finish cancelled out Diego's wondergoal as Barcelona rescued a 1-1 draw with Atletico Madrid in the UEFA Champions League.
It appeared as though the visitors would take a slender lead from the quarter-final encounter at Camp Nou on Tuesday after Atletico's Brazilian midfielder struck.
Diego had started on the bench, but was called upon in the first half when Diego Costa – who overcame a knee injury to start the match – had to exit play.
And he duly lit up a match that proved every bit as tight as their respective positions in La Liga suggested with a rasping drive from 25 yards.
However, Brazil international Neymar ensured Gerardo Martino's side would not head into the return leg at Vicente Calderon with a deficit when he curled past the otherwise excellent Thibaut Courtois with just under 20 minutes remaining.
Diego Simeone's men will still have the advantage of an away goal in that fixture, but the tie remains nicely poised after the first encounter.
The visitors showed no signs of being fazed by a boisterous home crowd in the opening exchanges, home goalkeeper Jose Manuel Pinto showing the biggest display of nerves, but former Barca man David Villa failed to punish his weak clearance, inexplicably missing the target from eight yards after being found by Arda Turan.
Centre-back Gerard Pique was forced off in the 10th minute after falling heavily in an aerial challenge, Marc Bartra replacing him.
Despite the setback, Barcelona started showing glimpses of their free-flowing best and Lionel Messi showed superb footwork to escape Miranda before his throughball was collected by Andres Iniesta who was denied by a great block from Diego Godin.
Atleti were hit with an injury blow of their own as Costa limped off and a subsequent lack of physical presence in their attack helped Barcelona dictate the tempo, but Messi’s tame five-yard header was the closest they went before the break.
Indeed, Martino's men were almost caught on the counter, Villa's curling effort from the edge of the box forcing Pinto into a smart low save on the stroke of half-time.
Barcelona were met with a dogged Atleti display in the second half, and their tenacity paid dividends in the 56th minute.
Diego skipped cleverly past Iniesta before drilling an unstoppable drive which swerved past Pinto and into the top right-hand corner.
Barcelona sought a quick response, and Sergio Busquets' well-controlled volley from 20 yards almost provided one shortly after the hour mark, but Courtois was equal to the task.
However, there was nothing the Belgian could to stop Neymar levelling matters in the 71st minute.
Iniesta's exquisite outside-foot throughball found the 22-year-old on the left-hand side of the area and he curled a fine strike past a despairing Courtois.
The equaliser buoyed Barcelona, and the visitors had Courtois to thank for ensuring a fourth draw of the season between the two sides, the Chelsea loanee making impressive saves from Iniesta and Messi, the latter of which was a fine diving stop to prevent the Argentina international's superb free-kick finding the net.
|Coach: G. Martino|
for Piqué 12'
for Fàbregas 68'
|BREAKING NEWS: Miranda completes Inter switch|
|Blind takes over as Netherlands coach|
|Mourinho: Premier League tougher to win than ever|
|Hamburg make Holtby move permanent|
|Southampton terminate Osvaldo contract|
|BREAKING NEWS: Swansea swoop for Eder|
|Abbiati extends Milan stay|
|Cruyff: Barcelona have lost their values|
|Vydra seals Watford move|
|Ambitious Clyne targets trophy haul with Liverpool|
|Claridge: Off-field incidents cost Pearson his job|
|Clyne becomes Liverpool´s sixth close-season signing|
|Imbula leaves Marseille for Porto|
|FIFA chief Blatter challenges critics to prove corruption claims|
|Distin joins Bournemouth|
|Bayern seal Costa deal|
|Arsenal confirm Diaby departure|
|Blatter to miss Women´s World Cup final|
|Bogdan sets sights on being Liverpool number one|
|Danilo eager to get started at Real Madrid|
|Leicester´s Wood joins Leeds|
|Porto confirm Atletico move for Martinez|
|Lloyd: Repetition key to netting penalty|
|Sheffield Wednesday job a ´dream´ for Carvalhal|
|´We played a complete game´ - Messi|
|Diaz upbeat despite heavy Copa loss to Argentina|
|Martino lauds Messi for selfless performance|
|Viviani makes surprise Verona switch|
|Estonian team wins cup match 31-0|
|No meeting with Arsenal has occurred - Vidal´s agent|
|United States 2 Germany 0: Ellis´ team reach World Cup final|
|Argentina 6 Paraguay 1: Messi leads Martino´s men to Copa final|
|UEFA Europa League Review: FK Zeljeznicar and FC Dacia Chisinau open with wins|
|UEFA Champions League Review: FC Pyunik make winning start|
|Sweden U21 0 Portugal U21 0 (aet, 4-3 on penalties): Carlgren the hero as Swedes claim Euro glory|
|Frankfurt capture Castaignos|
|Bastia face relegation over debt|
|Bahlouli makes Monaco switch|
|Pearson sacked by Leicester|
|Rekik set for Marseille switch|
|Ranocchia and Carrizo sign new Inter deals|
|Crespo handed Modena role|
|Cech reveals work permit prevented past Arsenal move|
|Ivory Coast cut coaching shortlist down to five|
|McCarthy satisfied with Mings sale|
|Heaton commits to Burnley|
|Bowyer: Rhodes and Gestede will not come cheap|
|Burton and Day depart West Brom|
|Mendilibar makes Eibar return|
|Milan agree to terminate Muntari contract|
|Copa final a dream come true for Sampaoli|
|CSKA Sofia demoted due to financial crisis|
|Wolfsburg warn off De Bruyne suitors|
|Kone: I want to prove I can cut it at Everton|
|West Ham v Lusitans: Bilic set for first game in charge|
|Millennium Stadium to host 2017 UEFA Champions League final|
|Ronaldo a ´possibility´ for Portugal´s Olympics squad|
|Liverpool should get rid of Sterling - Grobbelaar|
|Miranda arrives for Inter medical|
|Arsenal can challenge the best - Cech|
|Real star Bale can be better than Ronaldo, says Keegan|
|UEFA approves changes to FFP rules|
|Honduras v Mexico: Moreno´s injury may force Mexican rethink pre-Gold Cup|
|Hiddink was the wrong man for Netherlands - De Boer|
|Vargas: I was scoring with every shot at training|
|Zambrano red rocked Peru - Gareca|
|Paraguay to change tack against Argentina|
|Sampaoli thrilled with substitutes´ influence, applauds Peru|
|Martino rues Copa America date with former side Paraguay|
|Former Birmingham City player Thwaites among Tunisia victims|
|Chile 2 Peru 1: Zambrano´s red card helps hosts into Copa final|
|Thiago Silva: ´I didn´t even know the ball had hit my hand´|
|Ronaldinho set to sign for Antalyaspor|
|Jara ban reduced on appeal by one match|
|Hiddink leaves Netherlands post|
|Cresswell pens new five-year deal at West Ham|
|Koeman: No serious United bid for Schneiderlin|
|Barbados eliminated from World Cup qualifying after fielding ineligible player|
|Former Catania president admits buying matches|
|Jones agrees Manchester United deal|
|Argentina v Paraguay: Valdez hoping not to need another comeback|
|Milan seal Bertolacci signing|
|Cech grateful to Abramovich and Chelsea fans|
|UEFA Champions League Preview: Brotherly pride at stake as B36 play TNS|
|UEFA Europa League Preview: Tommasi set to aid La Fiorita qualifying bid|
|Cech leaves Chelsea to join Arsenal|
|Paulinho ends Spurs frustration with Guangzhou move|
|Sampdoria confirm Eto´o exit amid Antalyaspor talk|
|Garcia departs Espanyol ahead of expected Qatar move|
|Watford to delay Doyley decision|
|Schlupp agrees new Leicester deal|
|Schweinsteiger hints at Bayern stay amid United links|
|Bertolacci thrilled ahead of Milan move|
|Langerak leaves Dortmund for Stuttgart|
|Muniain extends Athletic contract|
|Youngsters to get chance on US tour - Van Gaal|
|La Liga chief hits out at Real Madrid over TV rights opposition|
|Villa confirm Wilkins as assistant manager|
|Dicks joins West Ham coaching staff|
|Heldt enters to jeers, exits to cheers|
|Paraguay pride has grown at Copa America - Aguilar|
|Van Gaal tight-lipped on De Gea|
|Bacca confirms Milan agreement|
|Weight of expectation on hosts Chile to benefit Peru - Gareca|
|MLS Review: Timbers thump Sounders thanks to Adi´s double|
|Dzeko ´would run to Roma´ - Pjanic|
|Peru won´t sit back - Sampaoli|
|Zenga: Cassano, Balotelli will not be joining Sampdoria|
|Victory to start A-League defence away to Adelaide|
|I want to play MLS ´at the peak of my career´ - Johannsson|
|Allegri: I like Isco and Oscar|