Gatlin sends Bolt a warning after winning 200m in 19.57 at US trials

Justin Gatlin (centre) crosses the finish line to win the 200 metres. Photograph: Christian Petersen/Getty Images Controversial Justin Gatlin set the stage for a World Championship showdown with......

Tintu Luka qualifies for 800m semifinals

India's Tintu Luka qualified for the women's 800m semifinals in the Olympic Games after finishing third in one of the heats on Wednesday. -London Olympics 2012 - Complete coverage Luka clocked......