The Court of Arbitration for Sport earlier today cleared Alexandr Kolobnev of doping at the 2011 Tour de France and rejected the International Cycling Union's (UCI) request to ban the Russian rider for two years.

The court ruled that Kolobnev's positive test for the diuretic hydrochlorothiazide after the fifth stage was "justified by medical reasons totally unrelated to sport performance."

"The CAS panel found that Kolobnev has been suffering from varix dilatation, a chronic vascular disease, for 15 years," the court said in a statement.

World sport's highest court upheld a Russian anti-doping tribunal verdict, which issued Kolobnev a reprimand and fine of $1,660.

The UCI had appealed to the court for a two-year ban and fine of $468,000 for the 2008 Beijing Olympics road race bronze medalist.

"We accept and respect all CAS decisions. They confirmed the stance of the national federation," UCI spokesman Enrico Carpani said.

Diuretics such as HCT can hide the presence of other banned substances, but anti-doping rules allow athletes to prove they did not intend to consume it or enhance their performance.

CAS accepted Kolobnev's defense that he had taken the drug in a product "to supplement the treatment for vascular disease."

The rider was able to show the court that he bought an over-the-counter medication in Russia two weeks before the race, and had it with him in France.

Kolobnev's positive test was the only anti-doping case opened following the 2011 Tour de France.

His Russian team Katusha withdrew him before the 10th stage and later dropped him before the 2012 season.

30-year-old Kolobnev also is a two-time runner-up in the world championships road race.