Catriona Matthew shot her second straight 4-under 68 to take a three-stroke lead after the third round of the Lorena Ochoa Invitational on Saturday.
The Scot, who won the 2009 Women's British Open for the last of her three LPGA Tour titles, had an 11-under 205 total at Guadalajara Country Club.
''I think I'm putting the ball better this year, being more consistent,'' Matthew said. ''I haven't made the mistakes that I have made in the last couple of years. More bad shots the last years. This year in general I've been more consistent and pitching the ball better, so makes it easier when you're on the fairway.''
She played the first 52 holes without a bogey before dropping a stroke on No. 17 Saturday.
Norway's Suzann Pettersen was in second place after shooting a 71. Defending champion I.K. Kim of South Korea (70) was another stroke back, along with Anna Nordqvist of Sweden (73).
''I'm delighted to be in the lead,...