Home favourite Ursula Wikstrom shot an opening-round 66 to take an early lead at the Gant Open in Finland.
The 41-year-old triumphed in this Ladies European Tour Event in 2017, which remains her solitary professional win, and holds a two-shot lead overnight but it could have been more were it not for two bogeys during her last four holes in a five-under-par score.
Magdalena Simmermacher of Argentina and India's Tvesa Malik, who clinched the Tipsport Czech Open last month, are joint second after rounds of 68 while six Finnish players are currently in the top 10 with five tied for ninth.
Olivia Mehaffey shot a round of 77 to sit on six-over par, two shots better off than Victoria Craig.
Fresh from success at the Aramco Team Series individual event, Norway's Marianne Skarpnord is part of the nine-strong group in ninth after shooting par in Turku.
England trio Florentyna Parker, Cara Gainer and Katrina Gillum carded two-over-par 73s to finish day one in 26th position, alongside Scotland's Heather MacRae.