Defending champion Lorena Ochoa took a one-shot lead going into the weekend at the Samsung World Championship after carding a second-round 67 on the 6,644-yard CANYONS Course at BIGHORN Golf Club on Friday. Ochoa, who sits at 9-under 135 (68-67), currently holds the lead over Paula Creamer, Angela Park and Angela Stanford. Creamer and Park, who were tied for the lead going into Friday's second round, both shot 3-under on Friday while Stanford shot a low-round 66 to make a move up the leaderboard.