Leyton Orient manager Justin Edinburgh died on Saturday, a few days after suffering cardiac arrest.
According to reports, the 49-year-old was taken to hospital on Monday where he was treated until his untimely death on Saturday.
Edinburgh watched Spurs lose 2-0 to Liverpool in the Uefa Champions League final in Madrid just two days prior to being rushed to hospital. He had guided Orient back to the Football League this past season.
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"We are completely heartbroken by this tragedy," said Orient chairman Nigel Travis in a statement released on Saturday.
"All our thoughts and love are with the Edinburgh family and we know from the messages that have flooded into the club over the last week that the wider football world will share our sentiments."
"The success that Justin brought to Leyton Orient was incredible, but more importantly the impact he had on us all as a winner and a wonderful, inspirational human being will be his legacy and will stay with us forever," he concluded.