Defending Olympic champion Jessica Ennis-Hill leads the heptathlon in Rio after the opening four events on Friday. Ennis-Hill enjoys a lead of 72 points ahead Belgium's Nafissatou Thiam in second place, while compatriot Katarina Johnson-Thompson finishes the first day in fourth. The long jump, the javelin and 800m await the athletes on Saturday Rio 2016: Ennis-Hill leads after day one as Rutherford survives scare