Vondrousova appeals four-year doping ban to CAS

Former Wimbledon champion Markéta Vondrousová has appealed to the Court of Arbitration for Sport (CAS) against a four-year doping ban. The suspension was issued in June after she failed to submit a sample when notified by a doping control officer. The Czech tennis player is contesting the ban, which would effectively end her competitive career if upheld.