Linda Wessberg takes route 66 in Paris
Wessberg, who won the event in 2007, had seven birdies and a solitary bogey in an impressive round at the Paris International Golf Club to lead by a stroke.
The chasing pack consisted of Italian Diana Luna, Caroline Masson of Germany and South Africa's Stacy Lee Bregman, bunched together on 67.
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Hide AdAfter excelling on a rain-softened course, Wessberg said: "It's a great golf course.
"It's playing pretty tough, I think, especially now that it's soggy in the ground. I think we've been very lucky with the weather.
"I played pretty solid; hit a lot of fairways and 15 greens. I played great last week as well but I couldn't hole one putt."