Ernesto Valverde was left ruing Barcelona's ineffectiveness in front of goal after their 29-match unbeaten run was ended by Espanyol in the first leg of the Copa del Rey quarter-finals.
Young Espanyol substitute Oscar Melendo secured the 1-0 victory for the hosts two minutes from the end with a neat finish, but Barca – who last lost in the Supercopa a Espana to Real Madrid in August – were left wondering what might have been in the Catalan derby.
Lionel Messi saw a penalty saved just after the hour mark and created a decent amount of chances in a game they dominated.
And Valverde believes their poor decisions in front of goal contributed to the defeat, while he also feels the penalty miss reinvigorated Espanyol and their supporters.
"Despite suffering in strategic situations, sometimes it seems that you suffer more because of the environment than the chances," Valverde told reporters.
"But their approach was to sit back and wait for us, closing any interior spaces. It was hard for us, but we had it under control.
"We were not successful in goal situations. The penalty save reactivated the crowd - there was some tension and then they scored.
"We wanted to do the same as always [in terms of the way they approached the game], but they defended well, they got it right in the move for the goal and Diego Lopez's penalty stop. We have to come back."
And Valverde feels that, although it is only a slender deficit, Espanyol are favourites ahead of next Thursday's return leg in Camp Nou.
"The favourite at the end is the one who is winning, who has an advantage, in the same way as when we drew in Vigo [against Celta in the last 16]," Valverde said.
"The result is not good for us. We have to play at home, but they'll try to score. It's the cup and you have to play until the end."
|Cole backs West Ham to keep Arnautovic|
|Injury rules Bernardo Silva out of Poland clash|
|Lamar Jackson debut start ´spectacular´ - Ravens coach Harbaugh|
|Babar run out the turning point, laments Sarfraz|
|West Ham boost London Stadium capacity to 60,000|
|A great advertisement for Test cricket - Williamson revels in stunning win|
|Van Dijk one of the world´s best - Klaassen|
|Floersch had ´angel on her shoulder´ in horror crash|
|Gascoigne charged with sexual assault|
|I am going to stay at Chelsea and fight, insists Giroud|
|Hansen to make announcement on All Blacks future|
|I have reached the top by joining Chelsea - Sarri|
|Bonucci tells Italy boo boys to ´live with less envy´|
|Dramatic Pakistan collapse gives Stead first New Zealand Test win|
|Button enjoying racing for first time in years|
|Dortmund chief not planning Pulisic sale|
|Theismann: Smith leg break ´heart-wrenching´ to watch|
|Wolves defender Jonny suffers knee injury|
|Holmes to meet with Sharks amid NFL switch talk|
|LeBron made 51 points ´look easy´, says Walton|
|McGuire signs four-year deal with Cowboys|
|Bears beat Vikings to extend NFC North lead|
|Peng overcomes Davis in Houston final|
|Kerr says this has been his toughest stretch as Warriors coach|
|LeBron scores 51 in Lakers´ win, Warriors fall to Spurs|
|Win more than Djokovic? Let´s chill out – Zverev|
|Steelers´ rally highlights wild day of close, last-minute finishes|
|Modric not worried about Ballon d´Or|
|Saints pull away for blowout victory over Eagles, extend winning streak to nine|
|Martinez laments loss of control by Belgium|
|Logano claims first NASCAR Cup championship|
|Luis Enrique delighted with attitude of Spain´s squad|
|Stevens tells Celtics to get ´tougher´|
|Griezmann: Being Messi´s lieutenant played a part in rejecting Barcelona|
|Curry proud of how Warriors handled Green-Durant incident|
|Courtois: Belgium thought Nations League job was done|
|Howell ends 11-year title drought to deny record-breaking Rodgers|
|Robben dismisses Bayern title talk|
|Huge blow for Redskins as QB Smith breaks tibia and fibula|
|Switzerland 5 Belgium 2: Seferovic treble crowns incredible comeback|
|Titans DC Pees taken to hospital during Colts game|
|Spain 1 Bosnia-Herzegovina 0: Debutant Mendez spares Morata´s blushes|
|Peterson goes sixth on rushing touchdowns list|
|Titans QB Mariota suffers elbow injury|
|Djokovic hails much-improved Zverev|
|Arnautovic refuses to discuss West Ham future after Austria win|
|Redskins QB Smith carted off after gruesome ankle injury|
|Jaguars shut down Jalen Ramsey trade rumours|
|Classy Zverev revels in victory, hails defeated Djokovic|
|Forget the Nations League was ever invented, jokes Northern Ireland boss O´Neill|
|Magnificent Zverev claims ATP Finals title|
|Mahrez double fires Algeria to 2019 AFCON|
|Mbappe hoping for French winner of Ballon d´Or|
|Northern Ireland 1 Austria 2: Last-gasp winner denies hosts maiden Nations League point|
|Teenager admits assaulting Wales great Thomas|
|Browns deny Condoleezza Rice is candidate for head coaching job|
|Koeman: Netherlands not favourites for Germany clash|
|Dalic ´not sad´ but blames fatigue for Croatia relegation|
|Proud Southgate hails England hero Kane as world´s best goalscorer|
|Last-gasp Exeter penalty try shatters Bristol|
|Mbappe dismisses talk of Cavani-Neymar rift|
|Keita will do ´great things´ for Liverpool – Mane|
|Mourinho needs time to fix Manchester United - Veron|
|Southgate sees progress as England reward loyal support|
|Miller hungry to ´knock out a Brit´ after Dinu demolition|
|Yasir, Hasan put Pakistan in control with five-wicket hauls|
|England´s resilience delights Kane as Three Lions secure Nations League Finals spot|
|Kane proves Nations League importance to England in Wembley decider|
|Muller, Hummels still important for Germany, says Low|
|Tevez in line for start in Copa Libertadores final second leg|