Dwain Chambers must wait until next week to discover his fate following a disciplinary hearing with UK Athletics today.
The European 100 metres champion faced a three-man panel after testing positive for the banned steroid tetrahydrogestrinone (THG) in an out of competition test last August.
Charles Flint QC chaired the panel hearing evidence presented by UK Athletics and 25-year-old Chambers, who has protested his innocence.
The case for UK Athletics, who are demanding a ban, was presented by David Pannick QC, who defended British tennis player Greg Rusedski at his recent drugs hearing in Montreal.
Chambers was represented by Michael Berloff QC, who defended Scottish skier Alain Baxter after he tested positive at the 2002 Winter Olympics following use of a nasal spray.
If found guilty, Chambers will face a mandatory two-year suspension and a lifetime ban from the Olympics. He would have 60 days to appeal the case to the Court of Arbitration in Sport.
PA