American Johannes Veerman fired a final-round 69 for an “indescribable” one-shot victory in a European Tour event at sweltering South African resort Sun City on Sunday. South African Aldrich Potgieter needed a final-hole par to force a play-off in a tense finish at the Gary Player Country Club 170 kilometres northwest of Johannesburg.But the 20-year-old, who took a three-shot lead into the final round, needed three shots to reach the green, then two-putted for a bogey five.Playing ahead of Potgieter, Veerman finished on five-under 283, one stroke head of Potgieter (75), Matthew Jordan…