AJ Foyt is recuperating after successful hip replacement surgery in Houston on Monday.
The American racing legend and IndyCar team owner has not been able to attend a race since Texas Motor Speedway last month due to chronic leg pain made worse by a fall on his ranch.
A previous operation to tackle sciatic nerve pain had prevented him from being at three rounds earlier in the year.
Foyt is expecting to make a full recovery, although it is likely to be August before he is back at racetracks with his team.
"I was a little nervous about this surgery but they had me up and walking the same day," he said.
"I'm sore but nothing like I was before the surgery. I guess I waited too long to have it done though because my hip was in really bad shape. They couldn't believe I was walking at all.
"The doctors tell me it will be six to eight weeks before I can travel."