Olympic 100m champion Marcell Jacobs has furiously denied doping allegations and claimed his gold medal was won with "blood, sweat, tears and injuries."
Jacobs, 27, shocked the world in Tokyo last summer when he took the title from America's Fred Kerley by clocking 9.80 seconds.
His time represented a new Italian record and the third occasion during the Games where he had broken the 10-second barrier, having only done so once previously.
