Di Matteo said: "JT is available for Sunday and is in a good position to be involved.
"But I don't think anyone is guaranteed a starting place. They all have to work and be fighting for their place in the team.
"They are all international players and I have a lot of quality in there at a very high level.
"David Luiz has played more than the others but I've been trying to rotate to keep the team as fresh as possible.
"JT is certainly a fantastic player for us and will continue to be so. He is our captain and our leader when he is in the team."