(Reuters) - The International Cycling Union (UCI) carried out 3,773 tests for mechanical doping during this year's Tour de France and none proved positive, the UCI said on Wednesday. Random tests were carried out before, during and after racing during the 21 stages of the three-week event and all were negative. The tests showed an "absolute commitment to leave no stone unturned," UCI president Brian Cookson told the ruling body's website. More...