I was rewatching the 10 000m world , with Tariku rabbiting his older brother Kenenisa up until the 5 000m point. And as I watched Bekele flying toward the world record, I noticed once again an extremely young, 18 years old Samuel Wanjiru running as hard as he could to follow the great Ethiopian. He was the only resistance left and finally capitulated to Bekele at the 6th km, but finishing with the still standing world junior record of 26:41, a really stunning time.
He them moved to higher distance, won the olympic gold in marathon and multiples marathon majors and set the HM world record. In a pre Vaporfly era before tragically dying in mysterious circumstances.
I feel like he could have given Kipchoge a lot of troubles in marathons and could have set more world records.