PARIS — South African Daryl Impey, who wore the yellow jersey on last year's Tour de France, failed an anti-doping test for the masking agent Probenecid, the Orica-GreenEdge rider said Wednesday. Probenecid is used to mask the use of doping substances, anabolic drugs in particular. Impey was not included in Orica-GreenEdge's nine-man Tour de France team, which came as a surprise when the Australian outfit made their announcement Tuesday. “I confirm that on 23 June 2014, I was notified by the President of Cycling South Africa, about an adverse analytical finding for Probenecid following an in-competition test on 6 February 2014,” Impey said in a statement. — Reuters