Also in 2008 she won the European Team Championship for England partnered with Trish Johnson.
Nilsson made a potentially risky decision, pairing Davies with Trish Johnson on Friday morning, because Johnson has been bothered by a neck injury.
Trish Johnson had a closing 70 to sign off at five under, while Sue Strudwick finished on the same mark.
Lopez began the day two strokes ahead of Trish Johnson, Patti Rizzo and Betsy King.
Kathryn Marshall of Scotland birdied the 18th from a bunker to tie Trish Johnson of England in second.
Pak was a shot ahead of Trish Johnson, who shot 64 on the strength of eight birdies and a bogey.
Britain's Trish Johnson now leads the US money list.
Bristol's Trish Johnson, ranked 19 last year and the one everyone's watching the tour number one Australian Corrine Dibnah.
Also there Trish Johnson, five under par for her and Lisa Hackney from Staffordshire lies fourth, she's four under.
Trish Johnson and Mary Beth Zimmerman had 70 to complete the list of players under par.