Cristiano Ronaldo was forced to cut short his participation in a Real Madrid training session this morning, sparking rumours that he is an injury doubt for Saturday's Champions League final against city rivals Atletico Madrid.

The Portuguese attacker's fitness has been the subject of much discussion over the last month.

He has now failed to complete any of Real's last three training regimes, while he also could not feature for 90 minutes against Deportivo La Coruna on the final day of the La Liga season.

Ronaldo's latest complaint was suffered after he collided with right-back Dani Carvajal and goalkeeper Kiko Casilla.

The 31-year-old appeared to be visibly distressed as he headed back to the dressing room.