The world record cements the Ugandan 24-year-old's standing as the new middle distance maestro.
Kipchoge was in line for a fifth London Marathon title.
“I am very disappointed that I cannot race on Sunday.”
Operating in the same ecosystem, they of course share a lot.
He was a budding star at Italian giants Lazio when a report out of Senegal claimed that he was not aged 17, as he said, but 41.