The World Anti-doping Agency (WADA) are to appeal to the Court of Arbitration for Sport (CAS) to demand tougher penalties against suspended Belgian tennis players Yanina Wickmayer and Xavier Malisse, WADA's legal director told AFP on Wednesday. Malisse and Wickmayer, the US Open semi-finalist, were last month both suspended by the Flemish Doping Tribunal (VDT) for one year for failing to comply with the "whereabouts" rule, which ensures that they are available for out-of competition testing.