The Blues had plenty of chances to take victory in Wednesday's first leg, but a lack of precision in front of goal cost them dearly
Antonio Conte called on Chelsea to rediscover their ruthless streak after Arsenal left Stamford Bridge with a goalless draw in the first leg of their Carabao Cup semi-final.
Four days on from Championship side Norwich City restricting the Premier League champions to a 0-0 stalemate, Chelsea were unable to find a way through against Arsene Wenger's men.
Alvaro Morata's personal goal drought extended to four matches, while defender Andreas Christensen proved ill-suited to the task when two golden headed opportunities fell his way after half-time.