BBC Sport's Chris Osborne at Stadium MK: "Time to bunker down for a long night. Michael Higdon puts the 1,500 travelling Blades fans in a better mood. It was almost short lived though, as Dele Alli rattled the post at the other end. After being a slumber party for 70 minutes, this is now a little livelier.

United have saved themselves late in the game at MK Dons. Michael Higdon rises to meet Robert Harris' cross and makes no mistake with his header to bring his side level. Looks like extra-time is on the cards.

Unbelievable. Just seconds after West Brom draw level, Bournemouth pour up the other end. Callum Wilson gets in behind down the right and the keeper gets a hand to his powerful shot but it has enough legs on it to cross the line.

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West Brom draw level - the keeper hitting it long and Georgios Samaras's angled shot is deflected past his own keeper by Tommy Elphick.

Binaya Basyal:, external Chelsea's subs against Shrewsbury in a fourth round against Shrewsbury - Willian and Nemanja Matic. Shows how difficult it's been tonight for the Premier League leaders.

Just five minutes to go in Shropshire now. Micky Mellon is geeing up his players on the touchline. Is there one last twist?

Here comes the Liverpool onslaught. Glen Johnson prods goalwards but is denied by Swansea keeper Gerhard Tremmel before Neil Taylor swoops in to lash clear the danger.

Substitute time for the home side - but it's not Mario Balotelli. Adam Lallana sprints on in place of Lazar Markovic.

Phil Brown
BBC 5 live pundit at the Greenhous Meadow

"Surely Didier Drogba has done enough to earn himself a break now?!"

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Phil Brown
BBC 5 live pundit at the Greenhous Meadow

"A brilliant cross from Willian, it's a vicious ball, and Didier Drogba caused loads of problems in there even though he didn't get the final touch. Absolutely devastating for Shrewsbury."

Maybe Jose will be home on time after all. Willian swings in a delightful cross from the left and, with Didier Drogba breathing down his neck, Jermaine Grandison turns past his own keeper. The Shrews look crestfallen.

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BBC Sport's Ged Scott at Greenhaus Meadow: "Inspired substitution at the Meadow. The man whose goal knocked out Premier League side Leicester in round two strikes again!

Five goals in 20 minutes for Derby, who have rallied from 2-0 down. This time Simon Dawkins flicks home Jonny Russell's cross at the near post.

Phil Brown
BBC 5 live pundit at the Greenhous Meadow

"Micky Mellon's played his trump card here! Andy Mangan's a predatory striker and he's just stuck it away. What a finish to the game we have got here now!"

Unbelievable stuff at Craven Cottage. After trailing 2-0, Derby now lead 4-2! It is Jeff Hendrick with an emphatic close-range finish after the home side had failed to clear Craig Forsyth's low cross from the left.

Silence at Anfield. Apart from a pocket of away fans who are going wild. Marvin Emnes brilliantly hooks a volley into the far corner to put Swansea ahead.

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They've only gone and done it. Shrewsbury draw level with the Premier League leaders courtesy of Andy Mangan who has only been on the field for a matter of seconds. A corner is met powerfully by Jermaine Grandison and, with John Obi Mikel struggling to clear, Mangan stabs home from six yards out.

Jose, ring the wife and tell her you will be late home. This tie could be going to extra-time and penalties.

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Set pieces have looked Swansea's best chance of nabbing a goal and they threaten again from a corner. French striker Bafetimbi Gomis leaps highest to meet Jonjo Shelvey's set-piece but it is straight at Reds keeper Brad Jones.

Still we wait for the opener in the only goalless League Cup tie of the evening left.

Saido Berahino is on for Sebastian Blanco. West Brom look worried, they're on their way out as it stands.

BBC Sport's Chris Osborne at Stadium MK: "There's life in this game after a slow first half. Benik Afobe's penalty sees him extend his tally at the top of the League Cup scoring charts to six for the competition. It looked an easy spot-kick to give, with Craig Alcock tripping Dele Alli just inside the area."

Mo in Manchester: What do people not understand? Fabio Borini and Rickie Lambert are not good enough. Can you see either one playing against Europe's elite. Yes Balotelli isn't scoring, but that can be partly due to the vast pressure put on him and the fact none of the team are playing well. Yes we need anther striker and the manger's the only one to blame for that. But when Daniel Sturridge is back, Balotelli will find his form.

Image source, AFP