Former Chelsea midfielder Michael Ballack’s son Emilio has reportedly been killed in a quad crash in Portugal.

The 18-year-old is said to have died in an accident around 2am on Thursday morning.

Portuguese media are reporting the tragedy happened in Troia south of Lisbon, close to a house his retired footballer dad purchased years ago.

German Michael Ballack is widely regarded as one of his homeland’s best-ever players.

He joined Chelsea in 2006 and won honours in his first season at the club. He left Stamford Bridge after playing part of a league and cup double in 2010.

Emilio posted photos of the sun setting on a Portuguese beach over the weekend as well as another snap of Comporta Beach Club, a trendy hangout near the scene of this morning’s crash.

Local reports said the accident that resulted in Michael Ballack’s son losing his life happened near an apartment block known as Villas do Mar.

Firefighters from nearby Gondola are known to have been mobilised. Details of the fatal accident have not yet been made public.

Emilio is one of three children the former Chelsea and Bayern Munich player had with Simone Lambe, the long-term girlfriend he married in July 2008.

He was born in 2002, a year after their eldest son, Louis and three years before their youngest, Jordi.