This week sees the final four teams remaining in the Carabao Cup battle it out for a place in the Final.
Here, we take a look back at some of the classic Semi-Final ties over the years...
Aston Villa 7-4 Blackburn Rovers (2009/10)
Billed as one of the most entertaining ties in the history of the League Cup, it was Aston Villa who came out on top in a 10-goal thriller to book their place in the 2010 Final. Villa secured a 1-0 advantage in the first leg away to Blackburn Rovers, but the script flipped in the West Midlands.
Martin O'Neill’s men soon found themselves trailing 2-0 on the night before Stephen Warnock levelled for Villa and James Milner converted from the spot as the hosts re-established their aggregate lead before the break.
An own goal, along with strikes from Gabriel Agbonlahor and Emile Heskey, had the Villains 5-2 up in the second half but Blackburn hit back with two more goals of their own to make it 5-4. Ashley Young got in on the action in stoppage time for Villa and it finished 6-4 at Villa Park and 7-4 overall.
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Stoke City 3-2 West Ham United* (1971/72)
*Second Replay
It took two replays to separate Stoke City and West Ham United after the two sides played out a 2-2 draw in a two-legged Semi-Final before registering a 0-0 stalemate in the first replay at Hillsborough. The second replay was staged at Old Trafford and it was the Potters – who went on to lift their first major trophy that year – who prevailed.
It was a tie which had everything over course of the four games, which lasted a total of seven hours. In the second leg of the Semi-Final, Stoke keeper Gordon Banks was the hero, keeping out Geoff Hurst’s penalty – a stop which the man himself declared the best save of his career, even better than denying Pele.
And in the second replay, Bobby Moore found himself between the sticks for West Ham following an injury crisis. The England skipper even managed to save a spot-kick from Mike Bernard, before the latter got to the rebound, and in the end, it was Stoke who progressed.
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Bradford City 4-3 Aston Villa (2012/13)
Just the second side from the fourth tier of English football to reach the League Cup Final – along with Rochdale – Bradford City pulled off one of the shocks of the competition when they overcame Premier League opposition Aston Villa in the Semi-Final.
The League Two outfit, who had performed a number of giant-killings along the way, worked their magic again on home soil at Valley Parade in the first leg. Bradford’s Nahki Wells and Rory McArdle netted either side of the interval before Villa halved the deficit late in the day. However, Carl McHugh restored the Bantams’ two goal cushion to take a 3-1 lead to Villa Park.
It was Villa who won the return fixture 2-1, with a late goal from Andreas Weimann making it 4-3 but Bradford hung on for the victory over the two legs to shock their top-flight opposition and book a date at Wembley.
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Norwich City 2-1 Ipswich Town (1984/85)
The East Anglian derby is a rivalry that dates all the way back to the early 1900s but there was even more at stake when Norwich City and Ipswich Town did battle for a place in the 1985 League Cup Final.
On their own turf at Portman Road, the Tractor Boys claimed a slender 1-0 lead in the first leg, but champions elect Norwich – who would become two-time winners of the competition after beating Sunderland 1-0 at the National Stadium – came into their own at Carrow Road and sealed not only the local bragging rights, but a place in the Final.
Canaries striker John Deehan levelled the scores on aggregate before Steve Bruce – the Man of the Match in the Final against the Black Cats – famously grabbed the winner to etch his name into the Club’s history books.
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Queens Park Rangers 7-2 Birmingham City (1966/67)
Even Birmingham City boss Stan Cullis didn’t expect his Blues side to find themselves 4-1 down to Queens Park Rangers at the conclusion of the first leg of the Semi-Final at St Andrew’s in 1966/67. Rangers – the competition’s original underdogs – were all but through to the Final with a comfortable lead like that.
Prior to the first leg, Cullis had told his team that nothing less than a 2-0 lead would be satisfactory for higher ranked Second Division side Birmingham, but QPR were in fine form in the league and about to become the first Third Division side to lift the League Cup.
A 3-1 win in the second leg took the Hoops a step closer to glory at the home of football, where they would come from 2-0 down to beat reigning champions West Bromwich Albion.