(CNN) -- South Korea's In-Kyung Kim and Na Yeon Choi caught early leader Becky Brewerton to force a three-way tie at the top after the first round of the Evian Masters in France on Thursday.
Na Yeon Choi lost in a three-way playoff with Helen Afredsson and Angela Park at the Evian Masters last year.
Welsh golfer Brewerton shot a five-under-par 67 to set the clubhouse lead at Evian-les-Bains, carding seven birdies -- including three in a row from the fifth hole -- and two bogeys.
She qualified for the tournament after winning the Open de Espana Feminino last weekend, her first victory on the Ladies' European Tour since 2007.
The 21-year-old Kim, who won the LPGA Tour's State Farm Classic in June and has won almost $1 million in prizemoney this year, eagled the par-four 11th hole and also collected three birdies in a flawless round.
Last year's runner-up Choi, who has had top-10 finishes in major tournaments this season at the U.S. Women's Open and the LPGA Championship, birdied three of the last four holes. She also picked up three strokes on the opening nine holes before bogeying the par-four 10th.
The leading trio were chased by a group of four players on 68: Britain's Karen Stupples, American Wendy Ward, Korea's Sybase Classic champion Ji Young Oh and France's Karine Icher.
Former world No. 1 Karrie Webb of Australia was in a group of five players another shot back on 69, while Americans Paula Creamer and Cristie Kerr were in a bunch of 14 on 70 which also included defending champion Helen Alfredsson of Sweden.
Solheim Cup hopeful Michelle Wie birdied the last two holes to be tied for 53rd on one-over 73, while world No. 1 Lorena Ochoa had a miserable day to finish tied for 75th after double-bogeying her opening hole and carding a 75.
Angela Park, who was also in the playoff with Alfredsson and Choi last year, was a late withdrawal.
The tournament, which has a total prize purse of $3.25 million, is a co-sanctioned event with the LPGA Tour and its European counterpart.