Overbold? Maybe. But the serbian Vladimir Savanovic launched the "glove" of the challenge without too many pleasantries to the british Tom Bosworth, holder of the best world performance on the unusual distance of the racewalking mile (1609,344m). The athlete from the Balkans, which everyone will remember for the spectacular start in the 50Km of Rio 2016, has addressed directly to his opponent with a clear and unequivocal Facebook post: "Challenging world record holder Tom Bosworth on the distan...