Joseph Parker is punched by Fabio Wardley. Photo / Photosport

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Kiwi heavyweight boxer Joseph Parker failed a drugs test on October 25, the day of his shock loss to Fabio Wardley in London, his promoter announced Friday.

The 33-year-old former world champion suffered an 11th-round stoppage defeat by British boxer Wardley, in a fight concluding shortly before midnight local time,
and lost his status as WBO mandatory challenger for undisputed heavyweight champion Oleksandr Usyk.