The tiring Rooney gave way to Berbatov, while Shaun Wright-Phillips was the somewhat surprising replacement for Adebayor.
When we won there, they had Ryan Giggs, Paul Scholes and Dimitar Berbatov on the bench.
However, Tottenham manager Martin Jol stated last week that Berbatov is not for sale.
The partnership of Robbie Keane and Dimitar Berbatov had limited Defoe to mainly substitute appearances.
City also attempted to muscle in on arch-rivals Manchester United's acquisition of Tottenham striker Dimitar Berbatov.
It follows the departures of strikers Dimitar Berbatov and Robbie Keane to Manchester United and Liverpool.
Early in extra-time Bent almost replicated Berbatov's volley after he was sent clear by the Bulgarian.
The excellence of Defoe and Berbatov only served to highlight the failings of Villa's attack.
BBC: Defoe has scored six league goals for Spurs this season
Former Tottenham player Berbatov was impressive throughout, prompting his manager to describe his performance as "fantastic".
Berbatov exchanged passes with midfielder Gibson before unerringly driving a low shot into the bottom corner of Foster's net.
Dimitar Berbatov capped a fine performance by volleying past Robert Green from Nani's chipped cross.
Tottenham accepted City's bid for Berbatov, but the Bulgarian international opted to join the Premier League champions.
United have been linked with a host of strikers in recent weeks, notably Tottenham forward Dimitar Berbatov.
Substitute Berbatov came close when his flick-on from five yards was cleared off the line by Maloney.
Berbatov got his second with 11 minutes left, showing great technique to hook home Ronaldo's right-wing cross.
But Berbatov gave United the points by bundling home after Jussi Jaaskelainen failed to hold Nani's shot.
Rafael bagged a third before half-time with a left-footed shot and Dimitar Berbatov tapped in after the break.
United manager Alex Ferguson opted to rest the England striker, preferring Michael Owen in attack alongside Dimitar Berbatov.
CNN: Rooney heads winner for United in English League Cup final
The Dutchman feels he should not be blamed for the troubles at Spurs, or the departure of Berbatov.
Rooney blasted home from outside the box after Rafael and Berbatov had combined to set up the striker.
Dimitar Berbatov looked offside when he flicked home a close-range finish to put United ahead after 30 minutes.
Berbatov decided on unilateral action in the second half to prove attack is the best form of defence.
Berbatov struck after 89 minutes and Stalteri scored four minutes into injury time after Green had parried Defoe's shot.
The 26-year-old's representative Emil Dantchev insisted in April that Berbatov was staying put.
But Berbatov broke the deadlock before half-time with a header from a corner.
Spurs were still looking good going forward and only a flying save from Vaniak kept out Berbatov's curling free-kick.
Michael Carrick's drive hit Richard Hughes and thumped in off the bar and Dimitar Berbatov's shot made it 4-0.
Berbatov opened his goal account when he took advantage of a defensive mix-up to score 10 minutes after half-time.
Aalborg keeper Karim Zaza's clearance ricocheted off Ronaldo straight to Berbatov, but he shot wide of an open goal.
United created little in reply until after half-time when Dimitar Berbatov found the net with a magnificent overhead kick.
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