Portugal midfielder Deco is doubtful for Monday's clash with North Korea after picking up a hip injury.
Deco missed training on Saturday with the problem and he is now a major doubt for the clash with the Koreans.
Portugal coach Carlos Queiroz will now wait to find out the full extent of the injury before finalising his side for Monday's match.
"Deco twisted his left hip during training on Friday. He has painful symptoms so he is doing physiotherapy and gym work," said a Portugal team spokesman.
Goalkeepers Eduardo and Daniel Fernandes were also absent from training with stomach upsets.