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.

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.