TOKYO (Reuters) - About 30 kilometres into the men's marathon in Sapporo on Sunday, Kenya's Eliud Kipchoge pulled away from the pack and began running his own race, chasing immortality.

Kipchoge looked like a man determined to run towards his legacy of greatness. He took a peak behind him at one point and there was no one there. He was all alone - the greatest marathon runner in history and one of the greatest Olympians.