Women's British Open
-4 C Matthew (Sco) -1 C Kim Level J Shin, A Miyazato Selected others: +2 P Creamer (US) +4 K Webb (Aus) +6 S Head (Eng) +7 B Morgan (Wal), M Wie (US) +8 L Ochoa (Mex) +12 L Davies (Eng)
Matthew was co-overnight leader with Giulia Sergas
Scotland's Catriona Matthew will take a three-shot lead into the final round of the Women's British Open at Royal Lytham and St Annes on Sunday.
Matthew, joint overnight leader with Guilia Sergas, fired a third-round 71 to reach four under and lead from American Christina Kim (71).
Defending champion Jiyai Shin shot 68 to move from 17th to joint third at level par with Japan's Ai Miyazato.
American Paula Creamer is in a group back on two over.
Matthew is playing in only her second event since the birth of her second daughter 11 weeks ago and is bidding to become the first Scot to win the event and the first Briton since Karen Stupples in 2004.
"I'm delighted," said the 39-year-old. "I stayed patient and tried to stay relaxed, although it was tough with the pressure.
"The key here is to stay out of the bunkers and I pretty well managed to do that. But while it's nice to be a few shots ahead there is still a lot of work to do on Sunday."
Shin, who won last year at Sunningdale with an 18-under-par total, mounted her challenge with five birdies in the best score of the day.
"I'm right up there behind the leaders and this course is very tough, so I definitely have a chance," said the 21-year-old South Korean.
"It's much harder than Sunningdale. But I got a lot of confidence winning last year and I feel I can play really well when it matters."
World number one Lorena Ochoa of Mexico carded a 72 for four over overall, while Cristie Kerr, who leads the LPGA money list, is six over after a 75.
Michelle Wie, who is trying to earn a spot on the US Solheim Cup team, carded a 74 for a seven-over total.