Chelsea hit six second-half goals to win 6-1 this week.
Morris told chelseafc.com: "Fulham wanted to be tough to break down and had a lot of bodies behind the ball so we always felt the complexity of the game would change if we could score the first goal.
"They then had to change their approach, commit some bodies forward and that left gaps for us to exploit, which we did by playing some good stuff.
"Callum Hudson-Odoi was one of the players we spoke to at half-time. We wanted to let him know that he needed to be better running off the ball and getting in behind, not just coming to feet all the time.
"The minute he played with that increased urgency, he created the first two goals early in the second half so hopefully that will be a learning curve for him. You need to play with the right intentions, which we did both individually and as a team in the second half, and we got our rewards for that."