South African Oscar Pistorius, a double amputee who runs with carbon fibre blades attached to his legs, may have to wait until tomorrow before he learns if he can compete against able-bodied runners at the Beijing Olympics.

The International Association of Athletics Federations (IAAF) had been due to release a report yesterday by Professor Peter Bruggeman of the German Sport University of Cologne who had supervised tests on Pistorius.

But IAAF spokesman Nick Davies said that Pistorius had been given until midnight yesterday to respond to Bruggeman's findings.

"The IAAF is not likely to make any announcement until receiving Oscar's response, so probably not until the 12th of January," Davies said.

Remarks made recently by Bruggeman to the German newspaper Die Welt suggest the man dubbed the "blade runner" will be disappointed.

"He has a considerable advantage compared with athletes without prosthetic limbs who have undergone the same tests," Bruggeman was quoted as saying.

USA Track & Field (USATF) Chief Executive Officer Craig Masback has left the organisation to join Nike. The 52-year-old Masback, a former US indoor mile champion, had led the sport's US governing body for the past 10 years. He will become director of business affairs for Nike's global sports marketing division, the USATF said in a statement. The shoe and apparel company is a major USATF sponsor.