Pretoria - A man arrested for speeding on the N1 to Pretoria pleaded guilty to reckless and negligent driving in the Pretoria Magistrate's Court on Monday.

Adam Hack, 20, was fined R1500 for driving at 188km/h, Gauteng traffic police spokeswoman Busaphi Nxumalo said.

Hack and his father David, 55, were arrested on Sunday for speeding in their Porsche GT3s. David was driving at 234km/h, ahead of Adam.

David would appear in the same court on Tuesday facing charges of reckless and negligent driving, with an alternative charge of exceeding the general speed limit of 120km/h.

Nxumalo said Adam was a South African Olympic swimmer, but Swimming SA could not confirm this.

Beeld newspaper reported that Swimming SA spokesman Godfrey Monei knew most of the Olympic team swimmers, but did not know of an Adam Hack.

The South African swimming team for the London Olympic Games is in camp in Monaco where they are hosted by Princess Charlene of Monaco, an ex-South Africa Olympic swimmer. - Sapa