By Julien Pretot PARIS, Oct 5 (Reuters) - Former Giro d'Italia champion Ivan Basso ended his competitive career on Monday, a few days after recovering from testicular cancer. Inevitably, at some stage it will start dimming and it's the sign of a wise athlete to know when the moment has come to turn it off," Basso was quoted as saying in a statement from his Tinkoff-Saxo team, where he will retain a "managerial role". Basso looked on course for Tour glory when he won the white jersey for the best Under-25 rider in 2002, in an era dominated by the disgraced Lance Armstrong, a testicular cancer survivor. More...