Clarke wary of dangerous course

Darren Clarke will look to build on his impressive opening of 67 at the Nedbank Golf Challenge in Sun City when he tees off in the second round today but accepts that, with the course playing as difficult as it is, he cannot expect a repeat performance.

Clarke, on five under, and American Jim Furyk, a shot behind, were the only two players in the 12-man field to card bogey-free rounds.