Legendary boxer Muhammad Ali passed away from a respiratory issue at 74-years-old at an Arizona hospital on Friday. As a response to the death of the three-time World Heavyweight Champion who proclaimed himself “The Greatest,” track and field athletes paid their respects through social media to the boxer that inspired many. Here are some of the notable posts from Olympians, pros, NCAA All Americans and fans in the running community.

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To the Champ: pic.twitter.com/x0fMrIFEJt

— Oregon TC Elite (@OregonTCElite) June 4, 2016

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#RIPMuhammadAli

#_ pic.twitter.com/z74Ve7mkdv

— Barshim (@mutazbarshim) June 4, 2016

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If you even dream of beating me youd better wake up and apologize. Muhammad Ali pic.twitter.com/HHAOfobiI6

— ALTIS (@ALTIS) June 4, 2016

"I am the greatest, I said that even before I knew I was"
-Muhammad Ali

— Omar MrSilk McLeod (@Warrior_omz) June 4, 2016

Hoping for the best for The Champ Muhammad Ali. A true hero and inspiration. And a great friend!

— Michael Johnson (@MJGold) June 4, 2016

Greatest memories:watching Muhammad Ali light the torch at the Atlanta Opening Ceremonies. Thank you #trackandfield pic.twitter.com/VpeiHXEctG

— Tonja Buford-Bailey (@BaileyTonja) June 3, 2016