Kevin Keen believes West Brom should have beaten Arsenal in the League Cup on Wednesday after they were eliminated on penalties.
The Midlands club took the game at The Hawthorns to extra time when Saido Berahino cancelled out Thomas Eisfeld's second-half opener for Arsene Wenger's side.
Steve Clarke's men then hit the crossbar in extra time with a fierce strike from Morgan Amalfitano, before Scott Sinclair volleyed wide when unmarked in the box.
Those missed chances led to the shoot-out, and West Brom took a slim advantage when Serge Gnabry had his effort saved by Luke Daniels.
But Craig Dawson and Amalfitano fired wide, allowing Nacho Monreal to seal a 4-3 success for the visitors.
And assistant manager Keen admitted it was disappointing to exit the competition in the third round after a spirited display, but urged the team to switch focus to Saturday's Premier League visit to Manchester United.
"I think over the 90 minutes we probably just about shaded it and over the 120 we definitely shaded it," Keen said.
"So to come away without going through to the next round is rather deflating - and the lads are disappointed.
"We have to pick ourselves up and get ready for Old Trafford on Saturday.
"But overall we're disappointed because we’re out of the League Cup for another season.
"The damaging part of extra-time for me was that we had a couple of really, really good chances that on another day you’re finishing every time.
"They were chances to win the game but instead we went to penalties and ended up losing the game."
|Coach: S. Clarke|
for Y. Mulumbu 90'
for S. Long 90'
for S. Berahino 100'
|Mexico v Cuba: Orozco promoted as Herrera targets minnows|
|Haiti deserved to draw - Collat|
|Trinidad and Tobago v Guatemala: Goals at a premium in Chicago|
|United States 2 Honduras 1: Dempsey´s brace secures victory|
|Dos Santos confirms Galaxy interest|
|Panama 1 Haiti 1: Former finalists stunned late|
|MLS All-Star XI|
|Milan receive new stadium go-ahead|
|Lampard welcomes ´perfect´ NYCFC challenge|
|Shamrock Rovers 3 Progres Niederkorn 0: Waters at the double|
|Gerrard keen to emulate ´hero´ Beckham at Galaxy|
|UEFA Champions League Review: Red Imps make history, TNS breeze through|
|Ameobi extends Newcastle deal and heads for Cardiff|
|U.S. women celebrate World Cup victory with LA rally|
|Atletico agree Vietto deal|
|Silva appointed Olympiacos head coach|
|Presidential candidates unsure of Turan´s Barca switch|
|Toure keen to bounce back from ´disappointing´ campaign|
|El Salvador v Canada: Floro targets Gold Cup learning curve|
|Juve complete Zaza swoop|
|Costa Rica v Jamaica: Borges confident Wanchope´s men are ready|
|Marseille snare Sarr|
|Italy coach Conte to stand trial in match-fixing case|
|Castan keen to repay Roma´s faith|
|Rami thrilled to reunite with ´best coach´ Emery at Sevilla|
|Lusitans v West Ham: Tomkins seeks to silence minnows|
|Kagawa shines as Dortmund hit six in Japan|
|Alonso tips Gerrard for Galaxy glory|
|Firmino seeks self-improvement with Liverpool|
|Buffon bids farewell to Pirlo|
|Sterling named Europe´s ´most valuable´ young player|
|Casillas´ agent reveals Porto offer|
|Southampton bring in Martina|
|Dundee United accept Celtic´s Ciftci bid|
|McArthur pens new Palace deal|
|Bartomeu rules out Barca move for Pogba this year|
|Spurs have to be better now - Bentaleb|
|Milner expects central role|
|Micronesia thrashed again, this time 46-0|
|Marchisio: I cannot be Pirlo´s heir|
|Inter aiming for Champions League return - Icardi|
|UEFA Europa League Preview: Brondby and Slovan to protect handsome leads|
|Bentaleb pens new long-term deal at Tottenham|
|Barca agree Turan deal|
|FIFA bans Mayne-Nicholls|
|United States v Honduras: Klinsmann demands improvement ahead of Gold Cup opener|
|CONCACAF institutes extensive reforms in wake of FIFA corruption scandal|
|Mauri completes Milan move|
|City sign Turkey striker|
|Women´s World Cup final draws huge US TV ratings|
|My first Chelsea team better than current crop - Drogba|
|Bertrand set for lay-off after knee surgery|
|New five-year Juve deal for Marchisio|
|Allegri extends Juve contract|
|Koeman reiterates Alderweireld interest|
|Valencia bag Bakkali|
|New York City FC complete Pirlo capture|
|Panama v Haiti: Collat ready to challenge the best of CONCACAF|
|UEFA Champions League Preview: Harrison eyes TNS progression|
|FIFA sanctions Yemen for fielding ineligible player|
|Toulouse rubbish Ben Yedder exit reports|
|Mourinho ´knows what he´s doing´ with Falcao signing|
|Watford shell out club-record fee for Capoue|
|Braafheid signs Lazio extension|
|Nani finalises Fenerbahce move|
|Liverpool confirm O´Driscoll appointment|
|Liverpool have to start better - Lucas|
|USA simply too good - Sasaki|
|Portland Timbers 1 San Jose Earthquakes 0: Jewsbury wins it in stoppage time|
|No move yet for Van Persie|
|Lloyd wins Golden Ball, Silver Boot awards|
|Mascherano: I never grabbed Banega|
|Dunga requested Brazil not appeal Neymar´s suspension|
|United States 5 Japan 2: Lloyd stars with hat-trick|
|Fiorentina deny Inter criticism|
|Nani relishing Fenerbahce opportunity|