West Brom needed penalties to avoid a League Cup shock and scrape past fourth-tier Oxford United at The Hawthorns on Tuesday.
Jason Davidson was West Brom's shootout hero, scoring the decisive penalty to give Alan Irvine's side a 7-6 win on spot-kicks after the two sides were locked at 1-1 after 120 minutes.
Oxford entered the second-round clash at the bottom of League Two, with 80 places separating them and their Premier League opponents in the football pyramid.
West Brom dominated the first hour and took the lead through Johnny Mullins' own goal, but Danny Hylton's 86th-minute leveller forced extra time.
And with no goals coming in the additional 30 minutes, penalties were required to decide the contest, despite Oxford having Junior Brown sent off for a second bookable offence late on.
Oxford goalkeeper Max Crocombe made two early penalty saves but Michael Appleton – a former West Brom player and caretaker manager – saw his side miss their chance to win it.
And after West Brom keeper Boaz Myhill dived to his left to deny Oxford captain Jake Wright, Australia defender Davidson stepped up to give the hosts a nervy win.
Crocombe was called into action as early as the third minute, denying Chris Brunt from point-blank range, while Joe Riley produced a superb last-ditch challenge to keep out Saido Berahino.
West Brom's superiority was glaringly obvious and they finally opened the scoring in the 29th minute as Mullins turned a cross from Liverpool loanee Andre Wisdom into his own net.
The hosts nearly scored again just before the break, but Wright slid in to stop Brown Ideye tapping in an easy finish.
Oxford were better in the second half, though, and they came close to levelling proceedings in the 66th minute.
Carlton Morris charged down the left and, after linking up well with Brown, the midfielder inexplicably dragged an effort well wide from inside the area.
Appleton introduced striker Will Hoskins with nine minutes to play as he made a return to competitive football following more than 18 months out with a knee injury.
And it proved to be an inspired change as the 28-year-old played a major role in the equaliser, cutting a well-placed pass back to Hylton, who bundled home from close range.
Oxford almost scored again in the 94th minute, as Myhill spilled Alex Jakubiak's cross, before Brown's subsequent effort was cleared off the line.
Oxford were reduced to 10 men with eight minutes of extra time remaining, as Brown fouled Craig Dawson and was given a second yellow card.
They were still able to force penalties, though, and Crocombe's saves from James Morrison and Ideye gave Appleton's men the edge.
But Michael Collins and Tom Newey were unable to convert from 12 yards, and after debutant Cristian Gamboa saw his effort sneak under Crocombe, Myhill gave West Brom the edge.
And his save from Wright proved crucial as Davidson kept his cool to send West Brom into the third round.
|UEFA Champions League Review: Ajax crash out after home defeat|
|Blackpool handed suspended deduction|
|Bayern Munich 3 Milan 0: Guardiola and De Jong lock horns in tunnel|
|Akpom, Ojo and Solanke on the move|
|McClaren: No Newcastle bid for Austin|
|Real Madrid 2 Tottenham 0: Bale on target against former club|
|Mangala vows to improve on debut campaign|
|Tomlin completes Bournemouth switch|
|Astra v West Ham: Page hungry for first-team action|
|Di Maria arrives in Qatar for PSG medical|
|Vitesse v Southampton: Caulker prepared to wait for his chance|
|UEFA rejects Fenerbahce´s Fred appeal|
|Watford show support for assaulted fan as police charge six|
|Ibrahimovic to miss PSG opener|
|Klopp suited to Bayern job - Watzke|
|Eredivisie season-opener postponed due to police strike|
|Dortmund v Wolfsberger: Tuchel set for home bow|
|Griezmann at the double in Atletico win|
|Japan v South Korea: Halilhodzic calls for ´pride´|
|Mourinho enjoying improved relationship with Abramovich|
|Gradel agrees Bournemouth return|
|Inter switch an ´easy decision´ for Miranda|
|Bojan eyes early comeback|
|Vitesse hopeful over Solanke loan deal|
|Pedro will decide his own future - Luis Enrique|
|Iniesta handed Barcelona armband|
|Kukesi punished after Europa League abandonment|
|Leno hints at Leverkusen exit|
|Benitez explains Ronaldo absence|
|Pochettino backs Kane to be among world´s best|
|Messi not ruled out of Mexico friendly - Martino|
|China v North Korea: Kim´s side look for another win|
|River Plate v Tigres UANL: Copa Libertadores final evenly poised|
|Real target Ceballos focused on Betis - Mel|
|Torres: I´d give my life to win La Liga with Atletico|
|Platini can lead FIFA change - Fernandez|
|Mel: Betis won´t be signing Osvaldo|
|Ferrero defends Samp boss Zenga|
|Pochettino expects Spurs improvement|
|Bale ideal for United - Robson|
|Ferdinand: Di Maria will regret United failure|
|Benitez pleased with goalkeepers as De Gea transfer saga continues|
|Guardiola tips fit Schweinsteiger to shine|
|Confident Oxlade-Chamberlain hits back at Keane|
|Ferdinand: Stones would be ´a lunatic´ to join Chelsea|
|Qarabag v Celtic: Gordon wants positivity from Scottish champions|
|Higuain rejects extension from Napoli|
|Zamora returns to Brighton|
|West Ham can cope without Valencia - Gold|
|Wickham loses on Palace debut|
|Guardiola: No problem with Matthaus and Effenberg comments|
|Cartabia excited by Deportivo loan|
|Lyon confirm Rafael deal|
|Hysaj agrees deal to follow Sarri to Napoli|
|Rafael says his goodbyes to Manchester United|
|Dos Santos ready to get going with Galaxy|
|Pochettino rejects Soldado exit talk|
|Metatarsal misery for Mulumbu|
|Benitez: Benzema and Bale going nowhere|
|Mihajlovic: Ibrahimovic would make Milan title contenders|
|Hughes not taking any risks with Bojan|
|Guardiola relishing Audi Cup test|
|Di Maria ´taking a step up´ - Silva|
|Leicester bring in defender Benalouane|
|Deulofeu doubtful for Premier League opener|
|West Ham striker Valencia out for three months|
|UEFA: Qarabag-Celtic to go ahead|
|Palace seal Wickham swoop|
|Ronaldo and Benzema to miss Audi Cup|
|Marotta: Juventus could lose Pogba|
|Kante completes Leicester switch|
|Khedira ruled out for two months|
|FA accepts Mourinho criticism of Wembley surface|
|Robben rubbishes injury talk|
|Marchisio expects Milan title challenge|
|Rafael set for Lyon move|
|Celtic ´seeking reassurances´ over Qarabag pitch|
|Wenger beating Mourinho does not affect Chelsea - Zouma|
|Rooney moved by Everton welcome|
|Mancini not worried by lack of Inter goals|
|Coloccini wants to finish career at Newcastle - McClaren|
|Ramsey: Pressure to win trophies is nothing new|
|Terry: Wembley defeat could be a ´blessing in disguise´|
|Blatter not running for IOC re-election|
|Bendtner: Wolfsburg can challenge Bayern for Bundesliga honours|
|Liverpool relishing Britannia return, says Henderson|
|Everton big enough to keep Stones - Martinez|
|MLS Review: Fire stun Dallas as goals dry up|
|New Atletico signings excite Raul Garcia|
|Cahill expects Arsenal title challenge|
|Jovetic happy with Inter debut|
|Luis Enrique: Barca defence must improve|
|Yanev calls for calm after ugly scenes in friendly|
|Coppa Italia Review: Cittadella romp to victory, Brescia rely on penalties|