Capello insisted all the pre-match publicity surrounding Terry was now forgotten with all thoughts trained on overcoming Slovenia.
Terry intimated the players would speak to Capello about tactics and team personnel although these topics were not brought up at a meeting with the Italian.
Capello did concede that he may have made mistakes, although he did not elaborate on what they might be.
He said: "We trained very well today, compact, we know the game tomorrow will be really important, not what one player can speak about. We are really focused on the game.
"John Terry is one of the most important players. It is a really important game.
"Everything else is out of the mind of the players, out of my mind. I am happy because the players are really focused on the game.
"The relationship with the players is really good. The players are happy, training very well.
"If you win, sometimes we make mistakes but we win. It is possible I have made mistakes, possibly."