Mark McCormack, once described as "the most powerful man in sport", has died in America.
The 72-year-old was the founder and head of the International Management
Group, the world's best-known sports marketing and promoting agency.
His clients included golfers Tiger Woods and Arnold Palmer, tennis stars Pete Sampras, Andre Agassi, John McEnroe, Bjorn Borg and the Williams sisters, and even the Pope.
McCormack suffered a heart attack four months ago and subsequently went into a coma from which he never recovered.
Woods, who is playing in the Deutsche
Bank-SAP Open in Germany, led the tributes to McCormack.
His legacy is international sport as we know it
European PGA Tour chief Ken Schofield
"It's a loss for everybody," said the American golfer.
"He was the one who started it all - a genius when it comes to sports
marketing. If it wasn't for him we would not be in the position we are."
McCormack leaves three children from his first marriage and one from his second marriage to former tennis professional Betsy Nagelsen.
European PGA Tour chief Ken
Schofield, a close business associate of McCormack's, also paid tribute.
"His legacy is international sport as we know it," he said.
"I would not go as far to say that without Mark McCormack, golf
and tennis would not have developed as international sports, but the
reality is that they would not have developed as quickly and
efficiently without him.
"He saw the bigger picture for his company and his athletes and
I can think of no greater tribute."