Nafi Thiam pushed to last drop of sweat by Katarina Johnson-Thompson

A classic clash between two giants of the heptathlon who deserve more recognition than they get from their most gruelling event Nafi Thiam looks worried. Katarina Johnson-Thompson looks worried. It's a little after 8.30pm and the final race of the heptathlon is about to start, but really these are largely incidental details. There is a pretty good chance that at any randomly chosen moment in their week, Thiam and Johnson-Thompson can be found mid'frown, wearing the grave and harried expression o...