BUDAPEST - Justin Robinson is now a two-time world champion following another phenomenal performance at the World Athletics World Championships in Budapest, Hungary. On the final day of competition, Robinson ran the third leg of the men's 4x400 for Team USA where he split 44.74 to help the men to a world leading 2:57.31 first-place finish. This win comes after Robinson helped the 4x400 mixed relay to a world record a week ago 3:08.80 just over a week ago. Full World Championships Results. The win earned Team USA its 27th medal of the competition.