Chryste Gaines and Tim Montgomery have been given dates for their appeals to the Court of Arbitration for Sport over charges of doping violations.
Gaines and Montgomery will learn their fates next summer
World 100m record holder Montgomery's hearing has been set for 6 June, and Gaines' has been scheduled for 10 July, having been postponed from this month.
"The parties under-estimated the time needed to collect all the facts," said CAS secretary general Matthieu Reeb.
The duo, who strongly deny the charges, face lifetime bans if found guilty.
Charges against the pair were brought by the US Anti-Doping Agency.
The USADA charges followed a federal investigation into the Bay Area Laboratory
Co-operative (BALCO), whose owners face charges of distributing
As a result of that investigation, double world sprint champion Kelli White was suspended for two years and Olympic relay gold medallist Alvin Harrison was given a four-year ban.
Both admitted taking a variety of drugs, including the
previously undetectable steroid THG (tetrahydrogestrinone).