Olympic judo champion Tong Wen has overturned a ban for doping with clenbuterol and will regain her world title.

The Court of Arbitration for Sport in Lausanne, Switzerland, upheld the Chinese judoka's appeal yesterday against a two-year suspension imposed by the International Judo Federation. CAS cited a "procedural failure" by the lab. Tong tested positive for the muscle-building, fat-burning drug after winning the over 78-kilogram category at the 2009 World Championships in Rotterdam. It was Tong's fourth world title. She also won heavyweight gold at the 2008 Beijing Olympics.