Alvaro Morata has been diagnosed with a lifelong virus after feeling faint and needing to lie down after the loss to Porto.

Juventus boss Andrea Pirlo revealed the Chelsea flop complained of feeling ill after the 2-1 Champions League defeat on Wednesday.

Morata has now been diagnosed with Cytomegalovirus (CMV) which stays in the body for the duration of your life.

However, it is common and usually harmless and can cause flu-like symptoms – similar to those the Spaniard was exhibiting.

CMV is related to the herpes virus that causes cold sores and chickenpox but many people will carry it without realising.

It is transmitted via close contact but can only be passed on when it is ‘active’ – usually when you first contract the virus.