English teenager Charley Hull scored the first of the four points Europe required to win the Solheim Cup.
Hull lost the second hole to Paula Creamer, but the 17-year-old hit back to lead by three at the turn after a sparkling display.
A clearly rattled Creamer missed a short putt at the 11th to fall four behind and that became five with six to play, though the American holed out of a bunker at the 13th to prolong the match.
Hull, though, also birdied the hole to go dormie five and when Creamer missed a long putt at the next, Hull had a 5&4 win to record the first of the four points needed.
Leading 10.5-5.5 at the start of the day, Europe needed four points to win the trophy outright or three and a half to retain it.
Carlota Ciganda, Beatriz Recari and Karine Icher all led their games at that point but only Jodi Ewart Shadoff was all square, against Brittany Lincicome, with the Americans leading the other seven games.
Hull told Sky Sports 1: "It was good, I played good today. I've really enjoyed it.
"I wasn't really thinking what she was doing so much, I was just playing my own game.
"That (13th) hole was great, she hit it in the bunker, I hit it within three feet and she got the bunker shot. That's a great memory I'll always have."