England management believe the ankle injury suffered by Chelsea captain John Terry in training is not serious.
The 28-year-old Chelsea defender was hurt during a training run although England boss Fabio Capello hopes he will be fit to face Brazil.
"He was running on his own and twisted his ankle. I am confident he will be fit for tomorrow," said Capello.
"The doctors think he will be okay but I won't take a risk. If he is not fit, he will not play."
Wayne Rooney will step in as captain if Terry is ruled out.