Substitute Fraizer Campbell scored Cardiff City's winner for the second successive round as Bolton Wanderers were beaten 1-0 in the FA Cup.
Campbell, who came off the bench to provide the decisive strike in a 2-1 win at Newcastle United in the last round, repeated the trick at the Reebok Stadium, scoring the only goal of the game to send his side through to the fifth round for the first time in four years.
The former Sunderland man tucked the ball home from a tight angle in the 50th minute after Andy Lonergan failed to deal with a cross from Craig Noone, another substitute.
Bolton were unable to find a leveller as they attempted to put last week's embarrassing 7-1 defeat at Reading behind them.
Dougie Freedman made three changes from that game as Chris Eagles, Mohamed Kamara and Craig Davies all returned.
Cardiff, meanwhile, brought in six fresh faces. Magnus Wolff Eikrem made his maiden start for the club while Andreas Cornelius and Joe Mason, who spent eight games on loan at Bolton earlier in the campaign, featured from the off for the first time this season.
Neither goalkeeper was stretched in an uneventful opening half, Lonergan comfortably tipping Cornelius' deflected shot over the crossbar in the seventh minute.
In first-half stoppage time, Bolton's Lee Chung-Yong sent a left-footed volley a yard wide after a loose ball had dropped to him inside the area.
Ole Gunnar Solskjaer made a double substitution at the break, Campbell and Noone replacing Cornelius and Eikrem, and it paid almost immediate dividends as Cardiff took the lead.
Alex Baptiste got his head to Noone's cross from the right and the ball was spilled by Lonergan to the feet of Campbell, who swivelled and swept home into an empty net from close to the byline.
Campbell wasted a chance to double his side's advantage within six minutes, heading over from four yards after Lonergan once again struggled to deal with a ball into the box.
The hosts responded well, Neil Danns bringing a smart stop out of David Marshall two minutes later with a stinging left-footed drive.
Marshall then had to scramble to his right as Davies' cross was deflected towards goal in the 62nd minute.
Five minutes later Marshall was called into action again, flying to his right as Ben Turner deflected Baptiste's cross with his outstretched leg.
Lonergan saved from Kim Bo-Kyung in the final minute but it mattered little as Cardiff held on for their second win under Solskjaer, both of which have come in the FA Cup.
Freedman's side have just one win from their last six matches in all competitions.
|Coach: D. Freedman|
for C. Eagles 72'
for M. Kamara 72'
|Luis Enrique salutes ´special´ Messi|
|Iachini laments missed chances|
|La Liga Review: Barca hammer Levante, Villarreal in two-goal comeback|
|Serie A Review: Zeman denied Roma revenge, Inter held|
|Paris Saint-Germain 1 Lyon 1: Umtiti adds to pressure on Blanc|
|Levante 0 Barcelona 5: Five-star Barca crush 10-man hosts|
|Palermo 1 Inter 1: Visitors´ progress checked|
|Arsenal v Southampton: Koeman calls for focus|
|Swansea City v Everton: Both sides looking to bounce back in League Cup|
|Police to investigate after Balotelli abused on Twitter|
|Liverpool v Middlesbrough: Rodgers keen to regain winning habit|
|Arabian Gulf League Review: Al Wahda maintain perfect start, Al Jazira held|
|Real Madrid v Elche: Hosts look to build on Depor demolition|
|Eredivisie Review: Ajax triumph in derby, PSV romp to victory|
|Warnock proud after victory at Goodison|
|Mourinho not interested in Pellegrini jibes|
|Pellegrini slams ´small team´ Chelsea´s approach|
|Bundesliga Review: Leverkusen slip up, Cologne held in derby|
|Martinez rues failure to build on strong start|
|Sewe Sport 1 AC Leopards 0: Kouame strike seals slender advantage|
|Scottish Premiership Review: Derby joy for Dundee United, Celtic held|
|Vita Club 2 CS Sfaxien 1: Hosts seize advantage in semi-final|
|Mixed emotions for Lampard after denying Chelsea|
|Irvine hails best day so far|
|Manchester City 1 Chelsea 1: Lampard denies former club|
|Everton 2 Crystal Palace 3: Howard mistakes cost hosts dear|
|Pearson praises Leicester City spirit|
|Van Gaal laments United collapse|
|Pochettino makes no excuses|
|CSL Review: Evergrande leave it late, Liaoning Whowin edge thriller|
|Leicester City 5 Manchester United 3: Hosts stage famous comeback|
|Tottenham 0 West Brom 1: Morrison gives visitors deserved win|
|Lee claims first Hong Kong gold in Incheon|
|Sunderland v Stoke City: Poyet again up for the cup|
|Ancelotti wants Real consistency|
|Dortmund hit by Mkhitaryan injury blow|
|Inzaghi pleased with Milan progress|
|Monk: Hodgson will be back|
|Pardew: Cisse should not have played|
|We cannot entertain title challenge - Rodgers|
|Bayern Munich v Paderborn: Visitors´ surprise start faces litmus test|
|K. League Review: Suwon close gap on top two|
|Empoli v Milan: Inzaghi eyeing top three|
|MLS Review: Wright-Phillips treble inspires Red Bulls rout|
|Bender: We lacked ambition|
|McInnes unhappy after ugly bust-up|
|Cambiasso impressed with Leicester mentality|
|Valverde: Champions League is not an excuse|
|Simeone wants improvement in discipline|
|Conte keeping tabs on Pelle|
|Marseille deserved to beat Rennes - Bielsa|
|La Liga Review: Real end slump with rout, Atletico share spoils|
|Hart unsure on City future|
|Primeira Liga Review: Quinta inspires first Penafiel win, Braga claim late draw|
|ES Setif 2 TP Mazembe 1: Late winner gives Algerians the edge|
|Inzaghi upbeat despite defeat|
|Victory not ´revenge´ for Allegri|
|Simeone defends Jimenez|
|Ligue 1 Review: Gignac double takes Marseille top|
|Patience pays off for Tevez and Juventus|
|Eredivisie Review: Vitesse drop points again, Dordrecht salvage late draw|
|Serie A Review: Allegri wins on Milan return, Empoli fight back|
|Milan 0 Juventus 1: Allegri wins on return to San Siro|
|Klopp rues Dortmund display|
|Allardyce lauds ´outstanding´ first-half performance|
|Coton Sport 0 Al Ahly 1: Soliman screamer puts Egyptians in command|
|Newcastle earned friends with comeback draw, claims Pardew|
|Liverpool ´nowhere near the standard´ - Rodgers|
|Atletico Madrid 2 Celta Vigo 2: Nolito penalty frustrates champions|
|Bundesliga Review: Zinnbauer stops Bayern as Paderborn go top|
|Lambert to close training ground after bug|
|Poyet blasts lacklustre Sunderland|
|Goals and wins are coming - Dyche|
|Koeman calm after Southampton move second|
|Bruce bemoans Hull errors|
|West Ham 3 Liverpool 1: Hosts punish sloppy Reds|
|Mainz 2 Borussia Dortmund 0: Klopp suffers miserable return|
|Guardiola: Fixture congestion taking its toll|
|Deportivo thrashing answered critics - Ancelotti|
|League Two Review: Accrington thrill on Coleman return, Bury go top|
|Bony ´distraught´ after dismissal - Monk|
|Pardew praises senior players after Hull draw|
|Wenger: Ozil showed mental strength|
|League One Review: MK Dons hit Crewe for six, Swindon crush Sheffield United|
|Championship Review: Fulham woes continue under Symons|
|Scottish Premiership Wrap: Inverness overhaul Hamilton at the top|
|Hughes credits QPR fans|
|Aston Villa 0 Arsenal 3: Ozil shines as Gunners get back on track|
|Swansea City 0 Southampton 1: Wanyama leaves it late to down 10-man hosts|
|Deportivo La Coruna 2 Real Madrid 8: Ronaldo hat-trick helps end visitors´ Liga slump|
|Newcastle United 2 Hull City 2: Late Cisse brace lifts pressure on Pardew|
|Burnley 0 Sunderland 0: Both sides await first league win|
|Hamburg 0 Bayern Munich 0: Zinnbauer starts Hamburg reign with impressive point|
|Hosts strike gold on day two in Incheon|
|Redknapp hails Kranjcar quality|
|QPR 2 Stoke City 2: Kranjcar spoils Hughes´ Loftus Road return|
|Howard not expecting European hangover|
|J.League Review: Gamba clinch Osaka derby, Tokushima Vortis on the brink|
|Vermaelen ´getting better every day´|
|Rafael: I want to stay at United forever|
|Ulloa determined to maintain strong form|
|Vidic adjusting to Serie A referees|
|Conte: There is room for a professional Balotelli|
|Mourinho wants tougher sanctions for FFP breaches|
|Milan v Juventus: Allegri returns to San Siro|
|Allardyce lauds in-form Downing|
|Real Salt Lake 5 Colorado Rapids 1: Poor visitors lose again|
|Mignolet "aggressive", says Rodgers|
|´Old´ City approaching dangerous position, says Neville|
|Shakhtar´s Donbass Arena hit by shelling|
|Song excited to face hero Gerrard|
|Everything is normal, says Ancelotti|