Olympic race walk champion Matej Toth suspended for alleged doping breach

The reigning Olympic and world champion in the men's 50-kilometre race walk, Matej Toth, has been suspended over an alleged breach of anti-doping rules.

Slovakian athlete faces potential 4-year ban

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Slovakia's Matej Toth douses himself with water on his way to the gold medal during the men's 50k race walk at the world championships outside the Bird's Nest stadium in Beijing on Aug. 29, 2015. (Kin Cheung/The Associated Press)

The reigning Olympic and world champion in the men's 50-kilometre race-walk, Matej Toth, has been suspended over an alleged breach of anti-doping rules.

The IAAF's Athletics Integrity Unit said Sunday that the Slovakian was provisionally suspended due to irregularities in his biological passport, which tracks blood data over time for signs of drug use. He faces a potential four-year ban.

The AIU confirmed Toth remains suspended "pending the outcome of his case, adding: "As is normal process, and in order to protect the integrity of the case, the AIU will refrain from further comment until a final decision has been made."

If Toth is found guilty, it would be a heavy blow to race-walking, which is already reeling from a string of doping bans for Russian walkers who dominated major championships for many years.

Canadian race walker Evan Dunfee – who finished fourth at the Rio Olympics – stated that he belives his former training partner is a clean athlete.

Toth has previously spoken out against doping and backed the Russian team being barred from last year's Olympics. He had been due to compete next month at the world championships in London.

With files from CBC Sports