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."
|Messi makes Girona 36th LaLiga victims to set new record|
|Nigeria demolish Rwanda in FIBA qualifying|
|Jonker shines but India still seal T20 series|
|Deeney ´not bothered´ after ending drought from open play|
|Tigers back to business after Hardaker departure|
|Championship Review: Fulham beat Wolves, Sunderland hold Boro in ill-tempered thriller|
|Lions bounce back to win, Schoeman leaves it late for Bulls|
|Russell eyes Six Nations title after inspiring Scotland to win over England|
|Watford 1 Everton 0: Stunning Deeney finish moves hosts six clear of trouble|
|Benitez rues missed chances as Newcastle lose two-goal lead|
|Heynckes ´can live´ with home Bayern draw|
|Ronaldo is a team player - Zidane hails Real Madrid star´s Benzema gesture|
|West Ham fans reference Hitler in protest at club´s owners|
|Dyche dismayed by decisions before Gabbiadini goal|
|Russell´s redemption comes as Scotland seal rare England win|
|Wagner impressed with Huddersfield´s commitment after vital win|
|No place like home for Schmidt as Ireland leave it late to sink Wales|
|Liverpool win had everything – Klopp enthuses over West Ham´s Anfield rout|
|Khachanov sets up Pouille final after Berdych upset|
|Dunk equals record for own goals in a single Premier League season|
|Chiefs return to winning ways in thriller|
|Real Madrid 4 Alaves 0: Ronaldo at the double as ´BBC´ delight|
|Burnley 1 Southampton 1: Gabbiadini grabs late leveller|
|Brighton and Hove Albion 4 Swansea City 1: Two-goal Murray helps end Swans´ unbeaten run|
|Bournemouth 2 Newcastle United 2: Hosts in thrilling fightback after Gayle double|
|West Brom 1 Huddersfield Town 2: Van La Parra and Mounie seal vital win|
|Liverpool 4 West Ham 1: Salah nets again as Reds climb to second|
|Svitolina retains Dubai crown as Kasatkina runs out of steam|
|Ill Neymar included in PSG squad for Le Classique|
|Bayern Munich 0 Hertha Berlin 0: Lewandowski´s run ends as leaders are held at home|
|Ireland see off Wales in Dublin thriller to stay perfect|
|Gattuso surprised by AC Milan´s growth since taking over|
|Lambert defends ´best goalkeeper in Britain´ Butland after own goal error|
|Stokes expected to face Black Caps|
|Mkhitaryan, Ozil potential excites Mertesacker|
|A-League Review: Perth Glory in dramatic win, Melbourne Victory end losing streak|
|Leicester City 1 Stoke City 1: Butland howler costs Potters|
|Matic insists Man Utd can still do ´big things´|
|Fisher´s birdie streak secures share of Qatar Masters lead|
|Chinese Super League transfer window makes Simeone ´uncomfortable´|
|Ingolstadt score bizarre tap-in after Duisburg goalkeeper goes AWOL|
|Allegri cautious over Dybala fitness despite Higuain injury|
|Napoli´s Zielinski better than De Bruyne, claims Boniek|
|Seven-try Crusaders beat Chiefs, Waratahs and Brumbies win|
|Mourinho predicts ´amazing´ period for Manchester United|
|Mears expects ´good England win´ at Murrayfield|
|Barcelona midfielder Rafinha hoping to seal permanent Inter move|
|EFL Cup final: Where do Aguero and Aubameyang rank among Europe´s elite?|
|Klaasen and Mulder get Proteas Test call to face Australia|
|Settled Salah demands Champions League qualification for Liverpool|
|England not polished article - Shaw|
|Dembele staying focused after ´genius´ praise from Pochettino|
|Spain survive scare, USA cruise in World Cup qualifying|
|Shapovalov moves into Delray Beach Open semis|
|Davis, Jokic star with huge performances|
|Alli doesn´t dive, says Hodgson|
|Timberwolves star Butler suffers knee injury|
|Penguins acquire Brassard in three-team trade|
|Verdasco ends Thiem´s Rio Open title defence, Monfils exits|
|Salah has world´s best left foot? Don´t forget Messi – Klopp|
|Pochettino: Vertonghen one of Europe´s best defenders|
|He hasn´t raised the bar – Wenger plays down Guardiola success|
|Woods stays solid as List, Lovemark lead|
|Cake and victory for birthday boy Pouille|
|Klopp ´really proud´ of Firmino after Holgate case dropped|
|Munster upset Warriors as Leinster crush Southern Kings|
|Bouchard ´vindicated´ after USTA settlement|
|Warriors fall to impressive Wolves, Saints stay perfect|
|Conte: Chelsea´s winning mentality can´t be questioned|
|Benching Willian was a fantastic decision, boasts Chelsea boss Conte|