Norway's Karsten Warholm failed in his bid to set a new world record in the men's 400m hurdles at Tuesday's Golden Spike meet in the Czech city of Ostrava. The 24-year-old is in electric form and in Stockholm two weeks ago came within 0.09 seconds of Kevin Young's long-standing world record of 46.78sec which the American set at the 1992 Barcelona Olympics. A false start did not help matters in Ostrava, where Warholm blasted off to his usual fast start at the second time of calling. But the two-time world champion flagged coming through for victory at the line, clocking 47.62sec. frj/lp/gj