The Blues have won just once in the last four league games and Terry has since been sidelined by a trapped nerve in his right thigh.
"It has been really difficult to miss our last two games and the England match between them," said Terry.
"You want to be out there for every single minute of every game and it is not easy to have to sit any out.
"Watching from the stands, especially when we are up against it, is difficult when you are captain.
"Last season we were double winners for a reason and that is simply because we were better than everybody else. We will fight to keep it that way."