• Former Olympic swimming champion Park Tae Hwan (pictured) has filed an appeal with the Court of Arbitration for Sport (CAS), after the Korean Olympic Committee (KOC) imposed an additional three-year suspension, reports Reuters. Park was banned for 18-months by the Fédération Internationale de Natation (FINA) in March last year, however his ban expired on 2 March this year. The KOC regulation means that Park has not been selected for the 2016 Rio Olympics team. In a 4 October 2011 ruling, the CAS nixed Rule 45 of the Olympic Charter, which banned convicted dopers serving a ban of six months or more from the next edition of the Olympics.

• Spain’s Liga de Fútbol Profesional (LFP) is investigating allegations that Rayo Vallecano players accepted money to lose 2-1 to Real Sociedad on 8 May. In a statement, the club confirmed that the LFP was investigating, however denied media accusations that anything had occurred, stating that it is routine for the LFP to investigate any suspicious movement in odds.

• The importance of being able to scientifically prove that meat is contaminated was underlined by a UK Anti-Doping (UKAD) ruling issued on Friday, which banned a rugby union player for two years after he tested positive for clenbuterol. Sam Broster argued that his positive test was the result of eating contaminated biltong. ‘His only evidence on this point was anecdotal, and, though he submitted below that he had retained a piece of the allegedly offending biltong, he had not had it tested because he lacked the means to do so’, read the UKAD decision. ‘Mr. Broster’s anecdotal theories about his consumption of the biltong being the cause of his positive test simply do not reach the level of inquiry or evidence required by the relevant rule provisions or the applicable cases, and the Panel is not satisfied that Mr. Broster has met his burden of proof in this regard’.

• Carlos Diego Ferreira has been provisionally suspended by the Ultimate Fighting Championship (UFC), after it received notification of a potential anti-doping rule violation (ADRV) from the US Anti-Doping Agency (USADA). The UFC said it had removed Ferreira from his scheduled bout against Abel Trujillo on 29 May in Las Vegas.

• The World Boxing Council (WBC) has postponed Alexander Povetkin’s heavyweight fight with Deontay Wilder, which was scheduled to take place in Moscow on 21 May. The Russian returned a ‘positive test result’, said the WBC in a statement. It is understood that concentrations of meldonium in Povetkin’s blood are lower than those mandated in the World Anti-Doping Agency’s (WADA) Guidance Statement on meldonium. The WBC said that a ‘final ruling’ would be issued in the coming days.

• The Mexican government has become the latest body to join the Sports Integrity Global Alliance (SIGA), the body launched by the International Centre for the Security of Sport (ICSS) in April. “Following our positive cooperation with the ICSS, Mexico is joining the multi-stakeholder coalition of SIGA to help accelerate the adoption of international standards and best practices that will lay the proper foundation for ensuring a strong future for sport”, said Alfredo Castillo Cervantes, Head of CONADE, the Mexican Government’s authority on sport in Mexico in a statement.