Chelsea: Eden Hazard should be fit for the game after overcoming a calf injury, but new signing Ross Barkley will miss out as he continues his comeback from hamstring surgery. David Luis is avail once again after making his comeback in the FA Cup draw with Norwich at the weekend.
Arsenal: Arsene Wenger will once again watch from the stands as his touchline ban continues and the Frenchman will be without Mesut Ozil, Laurent Koscielny, Nacho Monreal, Sead Kolasinac, Aaron Ramsey and Olivier Giroud, who are all sidelined through injury. Ozil's absence means that Alexis Sanchez is expected to start, despite Manchester City having tabled a fresh bid for the Chilean. New signing Konstantinos Mavropanos could feature on the bench due to Arsenal's minor injury crisis at the back. Cup goalkeeper David Ospina will start ahead of Petr Cech, but other than that Wenger is expected to name a strong side. Midfielder Granit Xhaka and defender Shkodran Mustafi are both doubts for the game and face late fitness tests.
The thoughts of Chelsea boss Antonio Conte:
"When you play every three days, it's important to make rotations - but at the same time, your team must be very strong, otherwise you risk dropping in this trophy.
"It's a very important game for us, a semi-final and the chance to win a trophy. We deserve to be here and it will be a tough game against Arsenal.
"Our run in this competition hasn't been easy. In the fourth round we played Everton, the fifth round was against Bournemouth and now in the semi-final we play Arsenal.
"But we must be very happy because we have reached the semi-final. We want to try to do our best to reach the final."
The thoughts of Arsenal boss Arsene Wenger:
"We take the criticism on board and respond to it in a positive way - that's all you can do.
"We're in the semi-final of the League Cup and we have an opportunity to go through."
Form:
Possible lineups:
Chelsea: Caballero, Azpilicueta, Rudiger, Cahill, Moses, Bakayoko, Kante, Fabregas, Alonso, Hazard, Morata.
Arsenal: Ospina, Chambers, Mertesacker, Holding, Bellerin, Wilshere, Xhaka, Maitland-Niles, Sanchez, Welbeck, Lacazette.