Muhammad Ali was more than just a champion inside the ring. He was a revolutionary figure in his sport, introducing a completely new, unorthodox style to heavyweight boxing. He was a risk-taker, unafraid of taking a controversial political or social stance. And he remained hopeful, even when facing the toughest odds. It's no wonder today's most powerful entrepreneurs can relate.

Following the death of "The Greatest" on Friday at the age of 74, entrepreneurs such as Daymond John and other prominent members of the business community including Tim Cook and Tony Robbins flocked to social media to offer their respect and condolences. Here's a sample of what they said.

Apple CEO Tim Cook offered a simple dose of inspiration to honor Ali:

 

FUBU founder Daymond John and Def Jam Recordings founder Russell Simmons each added a personalized touch to their send-offs:

 

 

Celebrity coach Tony Robbins remembered the brash confidence that only the Louisville Lip could pull off:

 

Oprah Winfrey revealed where she picked up her toughest moves:

 

And Reddit co-founder Alexis Ohanian included a personal note, opening up about a fight of his own: