Brazil midfielder Willian has missed part of the team's latest training session after appearing to injure his back.
The midfielder, who had been tipped to start in place of injured Neymar in the semi-final, had to leave yesterday's session after pulling up with pain in his back.
According to the Daily Mail, the Chelsea player received treatment for several minutes before resting for the remainder of training, but was able to walk off the pitch without assistance.
The host nation take on Germany in Belo Horizonte on Tuesday.
