Europe sneaked into a 2.5-1.5 lead after the first series of Solheim Cup foursomes under blue skies at Gleneagles on Friday.
The only American win came in a thumping six and four victory for the Korda sisters, Jessica and Nelly, in the third match over Caroline Masson and Jodi Ewart Shadoff.
US captain Juli Inkster admitted she had been a little reluctant to pair the Korda sisters together, but they put in the request and it proved to be perfect pairing.
With four birdies and an eagle they were four up at the turn and another birdie at the 14th secured the victory.
"It was great playing with my sister," said Jessica, five years older at 26. "It doesn't matter if one of us hits a bad shot -- we just feel very comfortable together."