Chelsea boss Antonio Conte felt the performances of two youngsters in particular were major plusses for his side.
“I prefer to speak always about the whole team but I think this cup is very important to check the development of these young players,” he said.
“We have good young players and they need to play. I think the youngsters played a good game with the right intensity and concentration. When you lose it’s normal to see bad things but tonight I found a lot of positives.
“Usually you learn more after a defeat than a win but we must continue to work. I’m optimistic because I saw the right spirit and that’s very important. You can lose or win but you must have the right spirit. If I see that, I see a clear future.
“Tomorrow we start to work for Sunday’s game. We know we will play a very tough game against Southampton, who are in a good moment.”