Ugo Ehiogu has passed away at the age of just 44.
Spurs, where former England defender was working as their U23 coach, announced the sad news in a statement.
Ehiogu suffered a cardiac arrest at the Spurs training centre on Thursday. He was subsequently taken to hospital where he passed away this morning.
It is with immense sadness that we announce the passing of Ugo Ehiogu, our Under-23 coach.
Ugo received immediate treatment after suffering a cardiac arrest at the Training Centre yesterday before being transferred to hospital, where he passed away in the early hours of this morning.
Head of Coaching and Player Development John McDermott said: "Words cannot express the shock and sadness that we all feel at the Club. Ugo's immense presence will be irreplaceable. Our heartfelt sympathies go out to his wife Gemma and his family.'
The Club sends its deepest condolences to Ugo's family.
Gemma has specifically asked that the family are given privacy at this difficult time.
We should also like to place on record our thanks to all the medical professionals including those at North Middlesex University Hospital, Royal Brompton Hospital and Harefield Hospital for their care and support.
Ehiogu was best known for his time at Aston Villa and Middlesbrough.
He also won four caps for England.
Tributes are already being paid to Ehiogu.
We're devastated to hear the news that Ugo Ehiogu has passed away.
Our thoughts and sympathies are with all lucky enough to know him. pic.twitter.com/UXT4CXNIne
— England (@England) April 21, 2017
Can't believe the news that Ugo Ehiogu has passed away. Calm & warming vibe when in his company. My heart goes out to his family! #RIPUgo
— Rio Ferdinand (@rioferdy5) April 21, 2017
My thoughts are with Ugo Ehiogu, his family and close friends.. god bless Ugo. Rip 🙏
— John Hartson (@JohnHartson10) April 21, 2017
Shocked to hear that Ugo Ehiogu has passed away. Far far too young, My thoughts goes out to his family and friends! #RIP 🙏
— Shay Given (@No1shaygiven) April 21, 2017
Really upsetting news about Ugo Ehiogu .Football has lost a great player and a great man. Thoughts go out to his family. RIP Ugo🙏
— Chris Sutton (@chris_sutton73) April 21, 2017
Can not believe what's just been announced thoughts are with Ugo Ehiogu's family
— Jason MCATEER (@MCATEER4) April 21, 2017