Chelsea beat Manchester United 1-0 on Sunday but the Brazilian watched from the stands.
Jose Mourinho returned to the stadium where he won three Premier League titles.
The Manchester United manager is already considering the signings he wants to make in January.
The French midfielder has been sidelined for six weeks with a hamstring injury.
The Frenchman only signed a new contract at the club five months ago.
Thibaut Courtois and his teammates will "fight" for Antonio Conte the same way they did for José Mourinho in 2015, the goalkeeper says.
The Italian became a Premier League champion just five months ago, and now his job looks in doubt.
"I think he should look at himself, not others," the Chelsea manager said.
The Portuguese coach has spoken about his future and is being linked with other clubs.
The Old Trafford manager has problems on and off the field this week.
When he was arrested, a handwritten journal was found that contained positive references to bin Laden and Anwar al-Awlaki, a former senior leader of Al-Qaeda in the Arabian Peninsula,
The Manchester City manager looks set to bolster his squad even further in January.
The Portuguese coach has been hit with plenty of criticism lately.
Antonio Conte frustrated by Chelsea's failure to sign another striker in the summer.
The PSG squad is packed full of talent, too much to fit into one team. Antonio Conte and Jurgen Klopp are looking to take advantage of that.
The transfer window may have only just closed but Jose Mourinho is already scouting potential signings.
Donald Trump Jr. liked a derogatory tweet apparently aimed at the fact that Chelsea Manning is transgender.
The Chelsea forward has been talking about the impact of the Italian manager, and how quickly he helped him.
An anti-racism organization has contacted United over the chant.
English football's top tier enters the fifth week of matches this weekend.
Antonio Conte's team has had a good start to the season. Could it have been even better?