Shoaib Akhtar claims to be the first person to bowl a 100 mph (160 kph)delivery, but some believe Australia's Brett Lee has already beaten him to it.

Shoaib, 26, nicknamed the 'Rawalpindi Express', was clocked at 161 kph (100.04 mph) in the third and final one-day international against New Zealand in Lahore on Saturday.

His delivery eclipsed the previous-best of 99.8 mph (160.5kph), set by Australia's Jeff Thomson in controlled conditions during the 1975-76 season.

But in the wake of Shoaib's feat, an anonymous source has sent Lee's manager Neil Maxwell a highlights video of the Brisbane Test of 2000-01, which shows Lee sending down a 161.8kph delivery to West Indian Courtney Walsh.

It was the final ball of the West Indies' first innings in the first Test at the 'Gabba on November 23, 2000, and with the innings closing straight after the delivery, no spectators, officials or commentators noticed the speed displayed on the screen.

Australian wicketkeeper Adam Gilchrist confessed to having doubts when Lee was credited with a personal best of 157.3kph against South Africa at Cape Town last month.

"He may well have been quick, but I don't think that ball was," Gilchrist said at the time. "With all due respect to the sponsors of the speed gun, I'm not 100 percent sure of how accurate it is."

Lee declined to comment on the revelation, preferring not to take anything away from friend and rival Shoaib.

The pair will go head-to-head in June when Pakistan play three one-day internationals in Australia.

"It would be ideal if they could use the one speed-gun of course and that's why I'm looking forward to the Super Challenge this season," Lee said.

"Shoaib's coming out, it's going to be that same speed-gun and those same sort of conditions, so it's going to be really good for those quick bowlers who will be playing.

"If they can standardise the one speed-gun it'd be a lot better."

Maxwell has written to ICC general manager Dave Richardson about the possibility of a standard measuring device.

© Wisden CricInfo Ltd