Real Madrid forward Cristiano Ronaldo limped off towards the end of a training session on Tuesday, prompting speculation about his fitness for Saturday's Champions League final.

The former Ballon d'Or winner has been plagued by a thigh injury that saw him miss three games in April.He came off at half-time during Real's final La Liga game of the season.

Real Madrid face Atletico Madrid in Milan this weekend in a repeat of the 2014 final, which Real won 4-1.Portugal striker Ronaldo, 31, has scored 51 goals for Real this season.

Ronaldo won the Ballon d'Or in 2013 and 2014 and has been second on three occasions

The thigh that has hampered Ronaldo's late-season participation is examined

Ronaldo's absence from the starting line-up would be a significant blow to Real's hopes of landing an 11th Champions League title