Chelsea will look to stun Premier League leaders Arsenal on Tuesday and plot a route to the EFL Cup final.
The Gunners lead the two-legged semi-final after a 3-2 win at Stamford Bridge on January 14 and are the favourites to advance to a Wembley clash against Manchester City or Newcastle.
But Chelsea showed their resilience at the weekend, winning 3-2 at home to West Ham after trailing 2-0 at half-time.
They will need to show similar resolve if they want to edge out an Arsenal side who won 4-0 at Leeds United on Saturday and have a six-point lead at the top of the table.
