Rio 2016: Camille Lacourt joins doping criticism of Chinese star Sun Yang after 200m gold medal

French swimmer Camille Lacourt has waded into the Olympic doping controversy, casting doubt on new 200m freestyle champion Sun Yang, ABC Online reported.

Lacourt, who came fifth in the 100m backstroke final just after Sun's triumph, said swimming was becoming like athletics "with two or three doped in each final".

Lacourt has criticised the Chinese star. "Sun Yang, he pisses purple," Lacourt told French radio station RMCsport after his race.

"I am very sad when I see my sport getting like this. I have the impression I am looking at athletics, with two or three doped in each final," he added.