China's anti-doping agency (CHINADA) called for increased testing of American athletes, accusing the US of hiding "systemic" doping abuses as tensions escalate between the two nations leading the Olympics medals table. This follows a media investigation revealing that 23 Chinese swimmers who tested positive before the Tokyo Olympics were allowed to compete due to alleged contaminated food. CHINADA's statement highlighted concerns about US track and field doping, citing the case of sprinter Erriyon Knighton. The US tops the medals table with 27 golds, closely followed by China with 25.