Summary
Semi-final draw: Chelsea v Arsenal, Man City v Bristol City
FT: Bristol City 2-1 Manchester United (20:00 GMT) - BBC Radio 5 live
Smith with injury-time winner for City
FT: Chelsea 2-1 Bournemouth
Morata strikes injury-time winner a minute after Bournemouth levelled
Live Reporting
Tom Rostance
In pictures: Excitement building for Bristol City fanspublished at 18:50 Greenwich Mean Time 20 December 2017
Eight changes for Chelseapublished at 18:50 Greenwich Mean Time 20 December 2017
18:50 GMT 20 December 2017BreakingChelsea v Bournemouth (19:45 GMT)
Chelsea
Chelsea keep just three men in the team who started against Southampton at the weekend as Antonio Conte makes sweeping changes.
Chelsea: Caballero; Rudiger, Ampadu, Cahill; Zappacosta, Drinkwater, Fabregas, Kenedy; Willian, Batshuayi, Pedro
Rotation, rotation, rotation...published at 18:48 Greenwich Mean Time 20 December 2017
18:48 GMT 20 December 2017Chelsea v Bournemouth (19:45 GMT)
Bournemouth have never won a major trophy, and they are two games away from the final.
But manager Eddie Howe has suggested he will rotate his team before their trip to Premier League leaders Manchester City this weekend.
"There will be a certain number of changes as I don't want us to suffer any more injuries," Howe said. "We need to make sure we leave Stamford Bridge feeling good about ourselves again and having given a good account."
"This year, the top teams have been absolutely ruthless. Of course there are going to be upsets, but more consistently they have put their dominance together against the lesser sides."
Is that the right call? Would Bournemouth be better off putting tonight's game first?
Tonight's gamespublished at 18:48 Greenwich Mean Time 20 December 2017
18:48 GMT 20 December 2017Arsenal and Manchester City are already through to the semi-finals - who will join them?
Chelsea v Bournemouth (19:45 GMT)
Bristol City v Manchester United (20:00 GMT)
Wembley bound?published at 18:41 Greenwich Mean Time 20 December 2017
18:41 GMT 20 December 2017A test of priorities, a question of status?
Chelsea and Manchester United will doubtless make considerable changes for tonight's League Cup semi-finals, but what of opponents Bournemouth and Bristol City?
Their priorities are staying in, and trying to reach, the Premier League respectively.
But shouldn't all four clubs put the prospect of winning a trophy at the top of their lists?
After tonight there will be just four teams in with a shout of winning the EFL Cup...