Juventus midfielder Sami Khedira has been diagnosed with an irregular heartbeat.

The ex-Real Madrid man was left behind when the Bianconeri travelled to the Spanish capital for Wednesday's Champions League tie with Atletico.

That was despite the 31-year-old training earlier in the day.

Juventus boss Max Allegri announced on Tuesday night that the World Cup winner hadn't made the journey, but wouldn't go into specifics - only announcing that the club would shortly be making a statement.

Juve say the player has been diagnosed with an atrial arrhythmia and will undergo further tests in the coming days.

AF is an irregular heartbeat that can lead to blood clots, strokes, heart failure and other heart-related complications.