Arsene Wenger rued an early miss from Pierre-Emerick Aubameyang after his side were humbled 3-0 by Manchester City in the EFL Cup final at Wembley on Sunday.
The former Borussia Dortmund striker missed a gilt-edged chance to give the Gunners the lead inside the opening 10 minutes, only managing to hit Claudio Bravo, as Kyle Walker put in a last-ditch challenge.
His profligacy was punished soon after when Sergio Aguero took advantage of limp defending from Shkodran Mustafi to put Pep Guardiola's side ahead, before Vincent Kompany and David Silva added gloss to the scoreline in the second half.
Wenger admitted that his side's defending was not good enough but was quick to highlight Aubameyang's miss as a crucial moment in the game.
"I felt we had the first good chance – a very easy one that we missed," he told Sky Sports.
"After that we made a big mistake for their first goal.
"We controlled them pretty well in the first half, but they came out in the second half, and we were unlucky because the second goal was offside. But congratulations to Man City, they deserve the win.
"When you lose a game, you have to cope with being criticised. Emotionally after a game – particularly a final – you do not want to go too much into criticism.
"We must recover quickly – we came to the final and we lost but we have to focus on the next Premier League game [against City on Thursday].
"When you lose 3-0 you have to look at defending better. When you lose concentration against quality teams you pay for it.
"It's not application that was missed – it was lapses of concentration and a bit unlucky as well."
|Borussia Dortmund 1 Hannover 0: Batshuayi the difference again for Stoger´s men|
|Nice 1 Paris Saint-Germain 2: Alves earns late victory for runaway leaders|
|Icardi 100: Inter captain´s Serie A landmark in Opta numbers|
|Sampdoria 0 Inter 5: Four-goal Icardi demolishes former side|
|Gray´s tackling ton and Italy´s woeful run - the Six Nations in Opta facts|
|Van Gaal: Heynckes can become a Bayern Munich god|
|Real Madrid without Ramos for Girona test|
|South Africa include Morris & Olivier for remainder of Australia series|
|Icardi reaches 100 Serie A goals against former club Sampdoria|
|Ireland Grand Slam heroes denied homecoming by weather|
|Cardiff trip to Derby postponed due to snow|
|Ogbonna gets Italy call as cover for doubtful Chiellini|
|Sunderland suspend Gibson after drink-driving charge|
|Manly claim record Eels thrashing, Knights win late again|
|Winning FA Cup is not important, claims Chelsea coach Conte|
|No one will be compared to me – Cristiano Ronaldo|
|LeBron James: Cavs worried about Lue health|
|F1 2018 Pre-Season Report: Red Bull|
|F1 2018 Pre-Season Report: Force India|
|Melbourne Victory 5 Central Coast Mariners 2: Berisha leads rout with hat-trick|
|Clarke breaks three vertebrae, Greipel has collarbone surgery|
|Waratahs blitz Rebels after scoring 38 unanswered points|
|Del Potro relishing Federer showdown|
|Australia to host two games against Team USA in 2019|
|Grizzlies snap 19-game losing streak, LeBron´s triple-double lifts Cavs|
|McIlroy suggests limiting alcohol sales after Bay Hill abuse|
|Marotta dismisses Allegri-PSG links as Juve focus on Can|
|MLS Review: Champions Toronto still winless, Atlanta crush Whitecaps|
|Lukaku: A lot of players will join Manchester United next season|
|I feel like I just woke up – Indian Wells finalist Federer explains slow start|
|High-flying Reds win third straight in Buenos Aires|
|Salah and Liverpool don´t fear Man City: We´ve beaten them!|
|What can I lose? - Mourinho defends criticism of Man Utd players|
|Mourinho accuses Manchester United of being scared to play|
|Mourinho delivers stinging Shaw criticism after FA Cup win|
|Haskell: England not good enough during Six Nations|
|Allegri waits on Chiellini update after Juve´s SPAL stalemate|
|Stenson leads by one with DeChambeau and McIlroy lurking|
|Racing put pressure on leaders Montpellier as Toulon are toppled|
|Klopp eases concerns over Can´s back complaint|
|Six Nations defeats make no difference to England mindset – Hartley|
|Matic was an island of personality - Mourinho questions United mentality|
|Del Potro demolishes Raonic to set up Federer final|
|He´s getting quicker on the Zimmer frame – Schmidt jokes about Best future|
|SPAL 0 Juventus 0: Scudetto charge halted by Serie A strugglers|
|Manchester United 2 Brighton and Hove Albion 0: Lukaku & Matic book semi-final spot|
|Fresh rib fracture for Cavendish but ´no serious injury´ after crash|
|Unbeaten Federer fights back to reach Indian Wells final|
|Klopp: Salah could be among world´s best, but don´t compare him to Messi|
|Woods hopes to still be within reach at Arnold Palmer Invitational|
|Championship Review: Wolves on the charge as Monk lifts Birmingham´s spirits|
|Twickenham boos will ´put me to sleep at night´, Jones claims|
|Salah threatening Rush´s record for goals in single Liverpool season|
|Hodgson hopes Zaha avoided injury|
|Snow causes Wakefield-Widnes abandonment|
|Liverpool 5 Watford 0: Inspirational Salah nets four as Reds bounce back|
|Lambert rues Everton´s ´offside´ opener in costly Stoke City defeat|
|Scotland´s late rally leaves Townsend feeling positive for the future|
|Wales hold off France to claim second behind Ireland|
|Man Utd bench Pogba & Sanchez for FA Cup quarter-final|
|Pardew: Evans loss key to Bournemouth defeat|
|Zarco breaks track record to claim Qatar pole after Rossi crashes in practice|
|Ireland had to make every moment count against England – Best|
|Salah breaks Torres´ impressive Liverpool record|
|We are not heroes one day and villains the next – Mourinho continues defence of Sevilla exit|
|Lions bounce back against Sunwolves, Stormers end miserable streak|
|Jones: England losing streak only natural|
|They have many players who´d get in my team – The Sevilla stars Mourinho should buy|
|Mario Gomez will not beg for World Cup place|
|England´s form continues to run cold in Twickenham snow|