 Yuliya Krevsun, Elisa Cusma Piccione, and Zulia Calatayud were the fastest of the heat winners on the first day of competition.With only eight places on offer, there were a number of high-profile scalps in the semi-finals.The first race saw past medallists Calatayud and Benhassi fail to qualify, Svetlana Klyuka was fifth in the second heat, while Vessey and Jelimo dropped out in the third semi-final of the day.