Match ends, Bournemouth 2, West Bromwich Albion 1.
Bournemouth reached the last eight of the League Cup for the first time as Callum Wilson's late strike knocked out West Bromwich Albion.
The home side, who merited victory, led when Junior Stanislas fed Eunan O'Kane to drill his first of the season.
Wilson ran clear to finish right footed immediately after West Brom levelled through a Tommy Elphick own goal.
Chris Baird and Youssouf Mulumbu headed over late on but the Championship club are now two rounds from Wembley.
It is a sign of a remarkable transformation for a side who, six years ago, started the League Two season with a 17-point deduction for exiting administration in an incorrect manner, but now sit fourth in the second tier and are enjoying their best League Cup run.
Their meeting with West Brom was their first appearance in the last 16 for 51 years, but manager Eddie Howe said cup matches were "free games" ahead of kick-off, with his focus on their league campaign.
His relaxed nature was visible in his players, who though sometimes lacking cutting edge, attacked with the freedom of a side who have scored 12 goals without reply in their last three league outings.
Despite an 8-0 win at Birmingham on Saturday, Howe made 10 changes - as did Albion boss Alan Irvine.
The result was a game full of intent, which was also littered with penalty appeals. Craig Dawson - the only West Brom player to retain his starting place after Saturday's 2-2 draw with Crystal Palace - was the first who appeared to handball in the area.
The appeal was waved away, but Bournemouth led shortly after the break when O'Kane raced on to a ball from the impressive Stanislas to drive right-footed into the bottom corner.
West Brom responded and had a strong penalty appeal of their own turned down when Elphick slipped and handled in the area.
But the Cherries' centre-back was less fortunate when he turned a Georgios Samaras cross into his own goal with five minutes remaining.
The Baggies - with top-scorer Saido Berahino on off the bench - seemed to have been dealt a reprieve but substitute Wilson ran clear to scuff a shot across keeper Boaz Myhill and into the corner.
Baird connected with Berahino's cross from 10 yards at the death but his header sailed over and Bournemouth will eagerly await Wednesday's quarter-final draw.
- 15A Smith
- 14HarteBooked at 26mins
- 20FraserSubstituted forFrancisat 75'minutes
- 32O'KaneBooked at 15mins
- 18KermorgantSubstituted forMacDonaldat 88'minutes
- 9RantieSubstituted forWilsonat 69'minutes
- 25DawsonBooked at 8mins
- 21MulumbuBooked at 39mins
- 20O'NeilSubstituted forSessegnonat 63'minutes
- 28BlancoSubstituted forBerahinoat 75'minutes
- 9IdeyeSubstituted forSamarasat 55'minutes
- Paul Tierney
- Shots on Target
Second Half ends, Bournemouth 2, West Bromwich Albion 1.
Corner, West Bromwich Albion. Conceded by Simon Francis.
Attempt missed. Chris Baird (West Bromwich Albion) header from the centre of the box is just a bit too high.
Substitution, Bournemouth. Shaun MacDonald replaces Yann Kermorgant.
Goal! Bournemouth 2, West Bromwich Albion 1. Callum Wilson (Bournemouth) right footed shot from the right side of the box to the bottom left corner. Assisted by Adam Smith.
Own Goal by Tommy Elphick, Bournemouth. Bournemouth 1, West Bromwich Albion 1.
Attempt blocked. Georgios Samaras (West Bromwich Albion) left footed shot from the left side of the box is blocked.
Corner, Bournemouth. Conceded by Youssuf Mulumbu.
Dan Gosling (Bournemouth) wins a free kick in the attacking half.
Foul by Youssuf Mulumbu (West Bromwich Albion).
Attempt missed. Yann Kermorgant (Bournemouth) header from the centre of the box is just a bit too high.
Corner, Bournemouth. Conceded by Gareth McAuley.
Substitution, Bournemouth. Simon Francis replaces Ryan Fraser.
Substitution, West Bromwich Albion. Saido Berahino replaces Sebastián Blanco.
Foul by Ian Harte (Bournemouth).
Cristian Gamboa (West Bromwich Albion) wins a free kick on the right wing.
Callum Wilson (Bournemouth) wins a free kick on the right wing.
Foul by Gareth McAuley (West Bromwich Albion).
Substitution, Bournemouth. Callum Wilson replaces Tokelo Rantie.