The Brazilian defender questioned the tactics of the Conte after the manager called for a meeting where he spelt out what he was not happy with.
Conte was not happy having his authority called into doubt, and responded by publicly dressing down the defender and dropping him from the squad and he did not make the squad that played against Manchester United.
Luiz was told not to train on Friday and did a brief fitness session on Saturday.
The former Paris Saint- Germain defender worked with the club’s youngsters on Sunday morning before heading to Stamford Bridge.
Morata’s second-half goal made the difference as Chelsea kept a clean sheet and won the game with the services of David Luiz.