The U.S Solheim Cup partners finished at 26-under 254 at Midland Country Club. They opened Wednesday with a 68 in alternate shot, shot a best-ball 61 on Thursday and took a four-stroke lead Friday with an alternate-shot 64.

"It was amazing to be alongside Lizette," Kupcho said. "I think I was a little nervous coming into today just because I didn't want to let her down. I'm sure she probably felt the same way."

Kupcho won for the third time this year and in her career, while Salas won her second tour title.

Kupcho won the major Chevron Championship in early April in the California desert and the Meijer LPGA Classic last month in Belmont, Michigan. Salas also won the 2014 Kingsmill Championship.

"It's been a long time," Salas said. "I couldn't have done it without her. She's a great competitor, a great friend, and an mazing partner on the golf course.

"We played some amazing golf this week. My job was, or my goal was, to play well for her. We showcased how our games can complement each other."

To the winners go the spoils. PHOTO: Getty Images.

Matilda Castren and Kelly Tan were second after a 62.

Former Arkansas players Stacy Lewis and Maria Fassi shot a 59 to finish third at 20 under.

Cheyenne Knight and Elizabeth Szokol had a 61 to match Tiffany Chan and Haeji Kang at 19 under Chan and Kang shot a 62.

Australian Karis Davidson and Daniela Darquea finished tied eighth at 17 under after their eight-under round, while Sarah Kemp and Alena Sharp (also eight-under) were two strokes back in joint 10th position.

One shot behind them was seven-time major winner Karrie Webb and Marina Alex (five under) in a tie for 15th.

Annika Sorenstam and Madelene Sagstrom, tied for the first-round lead, closed with a 66 to tie for 28th at 11 under.

The 51-year-old Sorenstam made her second LPGA Tour start of the year and only her third since retiring after the 2008 season.