The American is seeking her third victory at the annual dash in New York City.
Bernard Lagat finishes second in 13:19, breaking American 5K road record.
The two have finished close together in several races in recent years.
He defeated Mo Farah and a group of Kenyans.
Kenyans and Ethiopians led the way.
He is showing versatility in the shorter distances.
Kiplagat, Choge have shown excellent form lately.
There were no upsets in the 1500m heats.
A Saudi runner has a good chance of upsetting the Kenyans.
Meseret Defar is going after her own mark.