Derkson on target for second win in a row
Two weeks after holding off defending champion and world number two Ernie Els in Dubai, Derksen carded an opening five-under-par 67 at Santo da Serra to lie one shot off the lead.
Spain's Jesus Maria Arruti set the clubhouse target with a six-under 66, but half the 144-man field were unable to complete their rounds following a three-and-a-half hour delay due to morning thunderstorms.