Usain Bolt has paid an emotional tribute to Team GB star Germaine Mason, who tragically died in a motorbike accident after partying at the sprinter's home in Jamaica.
The 34-year-old was killed instantly when he lost control of his vehicle in the early hours of Thursday morning, and Bolt could only look on helplessly after being one of the first to arrive at the scene.
The pair have been close friends since 2002, and while Bolt is yet to speak publicly about the incident, the Olympic legend posted a photo on his Instagram of the 2008 Olympic medalist.
Mason won a high jump silver medal in Beijing, only months after his lottery funding had been withdrawn because of some poor performances.
He proceeded to jump a personal best of 2.34m, but then saw his career ruined by a knee injury ahead of the 2009 world championships, when Bolt would go on to break his own 100m and 200m records.
The 9-time Olympic gold medalist isn't the only one to pay tribute, as British gymnast Louis Smith and marathon runner Jo Pavey have fondly remembered Mason.
That's not all though.
The likes of Mo Farah, Jessica Ennis-Hill, Denise Lewis, and Linford Christie all took to social media to post tribute messages.
You can see Bolt's emotional Instagram tribute below.
As you can see, no words were needed for Bolt, but it's clear for all to see that he's been truly effected by the loss of his close friend.
And Mason's former high jump coach Fuzz Caan who still works for British Athletics, has called for the athlete to be celebrated for his success.
He said: "Germaine was an outstanding athlete and a truly lovely man.
"He had a wry sense of humour and was a pleasure to be around. He was a great ambassador of British high jumping.
"It is an honour for us to have him as part of our sporting history."