Eliud Kipchoge says he’s not worried about Kelvin Kiptum in potential Berlin Marathon clash

“If Kiptum runs under two hours, he will always be second. I’ll always be the first one. So I have no worries at all,” Kipchoge said

Michigan runners finish marathon relay under 2 hours

A group of 45 Michigan runners completed a 42.2K relay to run under two hours

Kipchoge’s shoes spark backlash

Experts and spectators are asking if it’s talent or technology