Tony Stewart targets Daytona 500

CHARLOTTE, N.C. -- The third surgery on Tony Stewart's broken right leg was for an infection that "popped up" after the three-time NASCAR champion had begun walking a bit again.

Stewart underwent his third operation on Oct. 7, and said during a video chat Tuesday night on NASCAR.com that the risk of infection was something doctors had warned him about after his injury in an August sprint car crash.

"I was more worried about bones healing and skin healing," Stewart said. "The doctor was more worried about infection and really said the first two months were kind of the critical time. We were at the end of that two months for the most part and, all of a sudden, a spot popped up that was infected and that caused the surgery last week. I went from starting to walk again, not great, not just walking around the house like normal, but I could take eight or 10 steps at a time, to having to spend the majority of the day again laying down."

Stewart is still on track to be back in the car for the season-opening Daytona 500.

During the chat, Stewart fielded questions from fans who submitted them through social media. He was asked what his biggest concern was before NASCAR's inaugural Truck Series race this year at the Stewart-owned Eldora Speedway dirt track.

"Weather. That was the one thing we couldn't control was the weather," Stewart said. "It's not like a pavement track where you can bring a jet dryer out and two hours later have the track back in shape. You are blowing mud around. If it rains at the right time, it puts you out for the whole night."

Asked if NASCAR would ever race Nationwide or the Sprint Cup Series on dirt, or at Eldora, Stewart said he didn't know.

"I never thought I would see the Truck Series there," he said. "The Truck Series proves that anything can happen."