Dutch speed skaters Jenning de Boo, Femke Kok dominate Day 1 of long track worlds
Dutch sprinters lit up the opening day of the ISU speed skating world championships on Thursday, as Jenning de Boo and Femke Kok swept the men's and women's 500 metres and 1,000 distances to underline the host nation's dominance in Heerenveen, Netherlands.


