Tiger Woods has said that he did not feel the pressure of trying to break 60 shots at the WGC-Bridgestone Invitational.

The world number one was nine-under-par through 13 holes of his second round at Firestone, which gave him an excellent opportunity to post a score in the fifties.

However, the American missed a couple of opportunities to eventually get around in 61 blows, although that was still good enough to equal the course record and take a seven-shot lead.

"I didn't feel uncomfortable at all about being there," the 37-year-old told reporters. "I've been 10-under, 11-under par before out here, so to be 9-under is nothing that was uncomfortable or unusual.

"I had two opportunities to make a couple putts there at 15 and 17, so it certainly was an opportunity [to break 60], but when you're playing a par‑70 it's certainly a lot easier. But still, 9‑under through 13 is pretty good."

Woods won the last WGC event - the Cadillac Championship - at Doral back in March.