"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.

"Fifteen months ago they (the selectors) told me they wanted me to get my ankle 100 percent, make sure I'm taking wickets and make sure my pace is somewhere close to what it was earlier.

"I have done everything I have been asked to do. So it is a bit frustrating why I'm not playing."

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