JOHANNESBURG (AP) -- Oscar Pistorius has withdrawn from Wednesday's 400-meter race at the South African disabled championships, ending a tough meet for the double-amputee Olympic hopeful.
Agent Peet van Zyl says Pistorius was struggling with a blister on his leg which made it "very uncomfortable" to run, although the withdrawal was "more precaution than anything else."
Pistorius experienced a rare defeat in disabled competition in the 100 meters on Monday, then made a mistake during the final changeover in the 4x100 Tuesday that led to his team being disqualified.
Pistorius is expected to compete at South Africa's able-bodied nationals next month before traveling overseas. He needs one more Olympic-qualifying time in the 400 at an international event to be eligible for the London Games.