The Portuguese Football Federation said that midfielder Raul Meireles and defender Pepe were also undergoing special training programmes as they recovered from injuries.
"Cristiano Ronaldo and Raul Meireles are undergoing a programme pre-established by the medical department for their injuries, specific treatment and sporting reintegration exercises, on the pitch," said the FPF.
"Pepe is undergoing treatment and specific exercises in the hotel."
Real Madrid forward Ronaldo, the World Player of the Year, is suffering from an injury to his left thigh as well as patellar tendinosis while Meireles has an injury to his left thigh.
Central defender Pepe has a muscular injury in his right leg, the FPF said.
- Sports & Recreation
- Raul Meireles
- Cristiano Ronaldo