Arsenal took their place in the fourth round of the League Cup with a dramatic 4-3 penalty shoot-out victory over West Brom on Wednesday.
The two sides were locked at 1-1 following extra time at the Hawthorns, after Thomas Eisfeld's opener for the visitors had been cancelled out by Saido Berahino in normal time.
But misses from Craig Dawson and Morgan Amalfitano in the shootout allowed Nacho Monreal to smash home the decisive spot-kick to book Arsenal's place in the next round.
Steve Clarke made eight changes to the side that beat Sunderland 3-0 on Saturday, with only Youssouf Mulumbu, Sinclair and Stephane Sessegnon retaining their places.
Arsenal too took the opportunity to rest key personnel, with Per Mertesacker and Serge Gnabry the only survivors from the 3-1 win over Stoke City, while Nicklas Bendtner made his first start for the club in two years.
West Brom had the first chance in the 25th minute when Dawson's looping header from Graham Dorrans' corner required Lukasz Fabianski to tip over the crossbar.
Arsene Wenger's side were then lucky not to have 18-year-old debutant Isaac Hayden sent off. The midfielder’s sliding tackle on Mulumbu was late and robust but referee Robert Madley deemed it only a yellow card.
West Brom produced the best effort of the match on the stroke of half-time, when Reid’s 35-yard free-kick dipped and just grazed the top of the bar, but that near miss saw the teams go in level.
Mulumbu forced the first genuine save of the night on the hour mark, when he teed himself up for a volley that Fabianski parried out for a corner, but West Brom failed to orchestrate clear openings and were duly punished as Arsenal went ahead in the 62nd minute.
Bendtner’s sideways pass into the box was met by the run of Eisfeld and the 20-year-old showed good composure to coolly slot beyond Luke Daniels at the near post.
That goal should have allowed the visitors to exercise control of the game but, with 20 minutes remaining, the home fans were on their feet celebrating an equaliser.
Arsenal failed to clear their lines from a West Brom corner and a dinked cross from Dorrans was met by Berahino, who headed home from eight yards despite Fabianski getting a hand to the ball.
Both teams pushed forward for a winner in the ensuing minutes, but with neither able to find a breakthrough, the game headed for extra time.
Bendtner could have wrapped it up in the 97th minute when Serge Gnabry sent him racing clear, but the Dane took too long to get his shot away and allowed Dawson to recover and make a last-ditch tackle.
And with just four minutes remaining, substitute Amalfitano thought he had won it for West Brom but saw his drilled effort cannon back off the bar.
That meant the match headed to penalties where, after two successful spot-kicks for the hosts and one for the away side, Gnabry saw his effort saved.
But Dawson and Amalfitano both fired wide, leaving Monreal the chance to win the tie, and the Spaniard made no mistake as he fired high into the roof of the net.
|Coach: S. Clarke|
for Y. Mulumbu 90'
for S. Long 90'
for S. Berahino 100'
|Premier League spending hits £1bn in 2015|
|Italy v Malta: Conte calls for focus|
|De Laurentiis reveals failed Juve bid for Hamsik|
|Schweinsteiger: Manchester not as bad as everybody thinks|
|Galatasaray finalise Grosskreutz deal|
|Ilori agrees season-long loan with Villa|
|Wolfsburg want to ´annoy´ Bayern - Dante|
|Norwich bring in Jarvis on loan|
|Everton sign Lennon on permanent deal|
|United put blame back on Real Madrid over De Gea|
|Premier League Deadline Day: Berahino on strike, United make Martial number nine|
|Peace: West Brom must repair damage caused by Tottenham´s Berahino pursuit|
|Dyer secures loan switch to Leicester|
|Walters mocks deadline-day culture|
|Derby complete Johnson deal|
|Hector signed by Chelsea and loaned back to Reading|
|Watford secure Ibarbo loan|
|United´s Martial offer too good to reject - Monaco chief|
|No regrets over failed Juve move - Draxler|
|Guedioura returns to Watford|
|Berahino tweet casts doubt on West Brom future|
|Yedlin loaned to Sunderland|
|United complete Martial swoop|
|Strootman undergoes surgery again|
|FIFA set to clarify proposed Grosskreutz deal|
|Watford bolster strikeforce with Oulare|
|Belgium v Bosnia-Herzegovina: Time running out for visitors|
|Antonio makes West Ham move|
|I want to feel important at Leverkusen - Hernandez|
|Villa seal deadline-day swoop for Lescott|
|Austin to stay at QPR|
|Everton´s Gibson given driving ban|
|David de Gea: Timeline of Manchester United goalkeeper´s failed Real Madrid move|
|Southampton complete Van Dijk swoop|
|Bournemouth complete Murray deal|
|Real take aim at United over failed De Gea move|
|Premier League Deadline Day: West Ham bring in three, De Gea set for United stay|
|Reports: Real Madrid will not appeal De Gea transfer collapse|
|FIFA quiet on ´confidential´ De Gea paperwork|
|Chelsea sign Nantes defender Djilobodji|
|West Ham land Jelavic|
|Anthony who? Rooney had to ask who Martial was, says Schneiderlin|
|Moses joins West Ham on loan|
|Netherlands v Iceland: Blind era begins in Amsterdam|
|Deportivo snap up Gutierrez|
|Newcastle´s Kemen returns to France|
|Everton wrap up Funes Mori deal|
|Cyprus v Wales: Difficult to overestimate Bale contribution, says Davies|
|Blaszczykowski ´never considered´ Schalke move|
|Di Maria opens up about Van Gaal ´rows´|
|West Ham seal Song loan|
|Australia v Bangladesh: Luongo excited by Rogic partnership|
|Maturity, fitness vital for Shelvey|
|South Korea v Laos: Hwaseong hosts hunting goals|
|Japan v Cambodia: Hosts out to arrest four-match slump|
|Troisi joins Saudi giants Al-Ittihad|
|Casemiro lauds Benitez after re-signing|
|Rojo wants United stay|
|Milan tried for Witsel - Galliani|
|Conte eyes two Italy wins|
|Ligue 1 Deadline Day: Marseille sign three amid Martial saga|
|La Liga Deadline Day: Uncertainty over De Gea future, Joaquin back at Betis|
|Serie A Deadline Day: Juve and Inter busy as window closes|
|Layun swaps Watford for Porto|
|Joaquin makes Betis return alongside Van Wolfswinkel|
|Coventry City 2 Southend United 2: Ricketts salvages point for hosts|
|Real face anxious wait over De Gea as window shuts|
|Milan loan Mastour to Malaga|
|Juve sign Hernanes|
|Inter lure Ljajic, Melo and Telles|
|Lemina joins Juve as Marseille sign Isla and De Ciglie|
|Norwich land striker Mbokani|
|Hernanes in Turin for Juve medical|
|Blaszczykowski joins Fiorentina on season-long loan|
|Man City loan Denayer to Galatasaray|
|Matri loaned to Lazio|
|Aulas thrilled at sell-on profits from Martial deal|
|Ideye departs West Brom for Olympiacos|
|Bundesliga Deadline Day: Draxler in record Wolfsburg switch, Leverkusen and Dortmund land United men|
|Sunderland loan Giaccherini to Bologna|
|Lindegaard makes West Brom move|
|Ligue 1 Deadline Day: Martial arrives for medical at Man United|
|La Liga Deadline Day: De Gea speculation mounts, Raul Garcia joins Athletic|
|Liverpool sign Nigerian prospect Awoniyi|
|Serie A Deadline Day: Juve miss out on Draxler, Inter line up Ljajic|
|Hernandez joins Leverkusen|
|Deschamps hints Lloris could leave France camp amid United talk|
|Southampton recruit young goalkeeper Lewis|
|Giovinco ruled out of Italy qualifiers|
|World Cup winner Nesta named Miami FC coach|
|Januzaj joins Dortmund on loan|
|Dante completes Wolfsburg move|
|Draxler swaps Schalke for Wolfsburg|
|United-bound Martial hailed as ´innate talent´|
|Borini completes Sunderland switch|
|Draxler pictured in Wolfsburg kit|
|Congo v Ghana: Under-fire Grant targets friendly success|
|Antonelli doubtful for Milan derby|
|Raul Garcia completes Bilbao switch|
|Jovetic surprised by Inter start|
|Casemiro signs long-term Real deal|
|Bundesliga Deadline Day: Draxler set for Wolfsburg move, reports say|
|Sherwood would consider N´Zogbia exit|
|Ligue 1 Deadline Day: Martial´s United move edges closer|
|Fletcher lauds Evans capture|
|Serie A Deadline Day: Lemina on verge of Juve switch, Felipe returns to Udinese|
|La Liga Deadline Day: Abdennour presented at Valencia, all quiet on De Gea front|
|Martial leaves France squad to agree United deal|
|Bahebeck ´a little scared but all is well´|
|Dinamo Moscow announce Vainqueur switch to Roma|
|Ceballos uninterested in Real Madrid rumours|
|Motta thankful for Di Maria arrival|
|Marseille´s Lemina poised for Juve move|
|Benzema would have been good for Arsenal - Giroud|
|Low looking ahead to World Cup defence|
|Australia lose Mat Ryan|
|No contact from United over Cillessen, claims Overmars|
|OFC World Cup Qualifying Review: Cook Islands, Samoa start strongly|
|Neil looking to add fresh faces|
|No Jedinak, no problem - McKay|
|De Bruyne is phenomenal - Kompany|
|Van Gaal: Romero not to blame|
|Mack terrorises Palmer, Cardinals´ back-ups shine|
|Howard returns to USA squad|
|Sorensen signs for Melbourne City|
|Peralta, Montes withdraw from Mexico squad|
|Mancini: Inter need more players|
|Napoli target Soriano ´only wants Milan´ - De Laurentiis|
|Lovren determined to make amends after nightmare showing|
|Llorente laments Sevilla luck|
|Monk: Shelvey worthy of England selection|
|Sabatini apologises to Genoa over Iturbe U-turn|
|MLS Review: Red Bulls keep DC down, Sounders trump Timbers|
|Martinez: Stones didn´t mean to submit transfer request|
|Simeone hails Atletico performance|
|Di Maria: I was impatient to play|
|La Liga Review: Eibar down Supercopa holders|
|Raul Garcia set to join Bilbao|
|Garcia confident Roma are heading in the right direction|
|Serie A Review: Roma punish 10-man Juve, Eder thwarts Napoli|