Former Russian tennis player Maria Sharapova had been the most high-profile case of an athlete being banned for using meldonium. A failed drugs test at the 2016 Australian Open led to a two-year ban issued by the International Tennis Federation, with Sharapova accepting she had made “a huge mistake” in taking the substance.

Chelsea's Mykhailo Mudryk could be in line for a suspension after a doping test came back positive for meldonium.

Mykhailo Mudryk, one of the most expensive players in soccer history, says he is in “complete shock” after the results of a doping test contained a banned substance.