Ronaldo limped off towards the end of training on Tuesday after suffering a knock on a persistent left thigh problem.
Real's all-time record scorer missed three games last month due to injury and was also left out a practice match on Saturday by coach Zinedine Zidane as a precaution.
Ronaldo is aiming to break his own record of 17 Champions League goals in a season in Milan having already netted 16 in the competition so far this campaign.
The Portuguese set his record mark with a goal from the penalty spot as Real beat Atletico 4-1 after extra-time in Lisbon two years ago in the only other final between two sides from the same city.– AFP
Original source: Ronaldo resumes training