Tour De France Not Winnable Without Doping, Former Rider Bernard Kohl Says

12/05/2010 05:12 am ET | Updated May 25, 2011

LEESBURG, Va. -- Alberto Contador (right) didn't have to be flagged for a doping violation to remind retired rider Bernard Kohl about cycling's drug troubles.

"People know in cycling that's it's not possible to win the Tour de France without it," Kohl told FanHouse at the conclusion of the U.S. Anti-Doping Agency's annual science symposium on Monday.

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