Ronaldo still not fully fit
Ronaldo trained with his new Real Madrid team mates for the first time on Tuesday, although the Brazilian was still unable to take part in the squad's practice game at the end of the session.
Ronaldo suffered a minor muscle strain in his left leg almost immediately after completing a 47 million euro ($45.90 million) move from Inter Milan on August 31.
That injury limited his training to workouts in the gym and solitary sessions on the pitch but on Tuesday he was able to do some work with the squad in a session closed to the media.
"He was training more or less like everyone else," Real coach Vicente del Bosque told reporters at the club's training ground on Tuesday.
"How we move on will depend on what sort of shape he finds himself in. Everything will depend on his physical condition."
Ronaldo was plagued by injury problems during his last four seasons at Inter Milan.
He surged back to form at the World Cup, top scoring to help Brazil land a record fifth title, but his pre-season training was disrupted by the uncertainty over his club future.
According to Spanish newspapers, Ronaldo could be ready to make his Real debut in the Champions League against Genk on September 25.
"By September 23 he should be available to the coach," Real doctor Alfonso del Coral was quoted as saying in Spanish sports daily As on Tuesday.
"The player is keen to play as soon as possible but we won't move too quickly."