South African Rookie Aldrich Potgieter struggled late on the way to a four-under-par 67 on Saturday that left him with a one-shot lead over Brian Campbell heading into the final round of the US PGA Tour's Mexico Open.

VALLARTA, Mexico -- Aldrich Potgieter had the lead going into the final round of the Mexico Open, minus the cushion he enjoyed after a sloppy finish Saturday that made him settle for a 4-under 67 and a one-shot advantage over Brian Campbell at Vidanta Vallarta.

Though his lead was cut from his overnight advantage of four, the 20-year-old PGA Tour rookie Aldrich Potgieter did well to stay in front ahead of the final round. Potigieter moved to 20-under with a four-under 67 in round three.