Lausanne - Chinese Olympic swimming champion Sun Yang will learn on Friday whether he faces a possible eight-year ban for missing a drug test, the Court of Arbitration for Sport (CAS) said.
CAS said it would announce the decision on Friday.
The triple Olympic gold medal-winner, who served a doping suspension in 2014, is accused of refusing to provide bllod and urine samples when drug testers visited his home in China in September in 2018.
A vial of his own blood sample was smashed with a hammer during the testing session, but Sun was acquitted by swimming's ruling body FINA of anti-doping violations, agreeing that testers had failed to produce adequate identification.
But the ruling outraged the World Anti-Doping Agency (WADA) which took the matter to CAS, demanding a ban of between two and eight years for missing the out-of-competition test.
After being cleared by FINA Sun was able to compete in the World Championships in Gwangju, South Korea, in July, where he won two golds but became a focus of protests from rivals, especially from Australia.
Sun's CAS hearing, the first in 20 years that was open to the public, was beset by technical difficulties and interpreting errors between Chinese and English which frustrated lawyers and held up proceedings.