"To me fast bowling is so exciting because I haven't even hit my maturity as a fast bowler," he told reporters. "If you ask me if I can go faster, yes, I definitely do think I can go faster."

Lee, 28, who has not played Test cricket for more than a year, told reporters he was frustrated that he had not been selected for the team despite proving his fitness in the one-day arena following ankle surgery.

"It has been very frustrating. It has been close to 15 months since I played a Test match," he said.

"I spent six or seven months getting the ankle right and I come back to a team which is pretty much established and doing well.

Lee, who ranks alongside Pakistan's Shoaib Akhtar [ Images ] as the world's fastest bowler with deliveries around 100 miles an hour (160 kph), said he could bowl faster still.

"I started off bowling in the 140s and two years ago I was bowling in the 150s. The last match I played I bowled 160.8 kph, close to 161.

"The trend is that as I'm getting older I'm getting stronger. I'm still 28, very young, I feel like I'm in the body of a 21-year-old right now because I've had a lot of rest."