The Blues offered their condolences to their former star's family following the news amid reports of a quad bike accident
Michael Ballack's son Emilio has died aged 18, the ex-Germany international's former club Chelsea have confirmed.
Portuguese television station TVI reported that Emilio had died as a result of a quad bike accident.
Chelsea offered their condolonces to Ballack and his family by releasing a statement on Twitter.
Editors' Picks
"Everybody associated with Chelsea Football Club is shocked and saddened to learn of the death of Emilio Ballack at the terribly young age of 18," Chelsea announced in a statement .