Just hours after Sifan Hassan of the Netherlands broke the world one-hour record on the track in Brussels, Peres Jepchirchir of Kenya broke the women-only world record for the half-marathon in Letná Park in Prague in the elite-only Prague 21.1 KM. The petite athlete from Kapsabet clocked 1:05:34, smashing the ratified World Athletics record of 1:06:11 set by Netsanet Gudeta at the World Athletics Half-Marathon Championships in Valencia in March, 2018.