|Solheim Cup 2017|
|Venue: Des Moines Golf and Country Club, Iowa Dates: 18-20 August|
The United States extended their lead to 10½ to 5½ and need just 3½ points from Sunday's singles matches to retain the Solheim Cup after day two in Iowa.
European pair Jodi Ewart Shadoff and Anna Nordqvist won their fourball 4&2, but the US took the remaining three matches on Saturday afternoon.
Earlier the teams shared the morning foursomes, with two points each.
The contest concludes with Sunday's 12 singles matches and Charley Hull is expected to return for Europe.
England's Hull sat out the whole of Saturday's play with a wrist injury.
The tee times for Sunday have been moved forward to start at 15:31 BST, because of the threat of bad weather.
The US need 14 points to retain the trophy, while Europe need 14½ points to regain it.
Despite the deficit, European captain Annika Sorenstram says her team will not give up and drew on her own experience of becoming the first female player to shoot a 59 16 years ago.
"There have been a lot of comebacks in sports in general," she said. "Let's not just focus on just golf.
"March 16, 2001, before I teed off, nobody had shot 59.
"I'm still the only one that's done that. I know it's possible. There are a lot of things I can bring up that's possible. And history can be made.
"Hope is the last thing that's going to leave us and we're determined. We didn't fly these miles to not put up a fight. The fight is not over yet."
US extend lead into Sunday's singles
With the US leading 7½ to 4½ after the morning session, Europe desperately needed points on the board.
Nordqvist and Ewart Shadoff were first in the clubhouse after the fourballs, with a comprehensive win over Angel Win and Lizette Salas.
Sweden's Nordqvist, who is recovering from a bout of glandular fever, has won all three of her matches this week.
"There were a lot of birdies out there, not just between me and Anna, but Lizette and Angel played great, too," said Ewart Shadoff.
"It was a lot of fun playing with Anna. We have very similar games. We were there for each other when we needed each other."
Brittany Lang and Brittany Lincicome soon restored the Americans' advantage though as they narrowly beat Mel Reid and Carlota Ciganda.
Lang's birdie on the 18th ended the European pair's stubborn resistance, having fought back from being three holes down after seven.
Cristie Kerr, who became the US' record points scorer earlier in the day, chipped in for an eagle on the 15th to put her and Lexi Thompson three up against Catriona Matthew and Georgia Hall.
Matthew was just short on a long birdie attempt on the 16th as Kerr and Thompson took the match 4&2.
Paula Creamer and Austin Ernst then completed their win, beating Karine Icher and Madelene Sagstrom 2&1, to stretch the US advantage to five points.
It is the first time since 1998, that the US has led going into the singles matches.
|Saturday's fourball results|
|Reid/Cigana (Eur) v Lang/Lincicome (US) US won 2 up||Icher/Sagstrom (Eur) v Creamer/Ernst (US) US won 2&1|
|Nordqvist/Ewart Shadoff (Eur) v Salas/Yin (US) Europe won 4&2||Matthew/Hall (Eur) v Kerr/Thompson (US) US won 4&2|
Kerr sets US points record
Kerr and Thompson got the US off to a winning start on Saturday, winning their rubber 5&3 as the European pairing of Shadoff and Carolina Masson won just one hole.
Kerr's victory saw her become the all-time highest US points scorer in the Solheim Cup on 19, surpassing team captain Juli Inkster.
Creamer and Ernst won their match by the same margin as they outplayed Mel Reid and Emily Pedersen, as Creamer, playing in her seventh Solheim Cup, also reached a milestone, passing Inkster as the all-time American points winner in foursomes matches with 8.5 points.
Nordqvist and Georgia Hall got Europe on the board, winning 3&1 against Stacy Lewis and Gerina Piller, before Icher and Matthew edged their match 2&1 against Michelle Wie and Danielle Kang.
|Saturday's foursomes results|
|Ewart Shadoff/Masson (Eur) v Kerr/Thompson (US) US won 5&3||Nordqvist/Hall (Eur) v Lewis/Piller (US) Europe won 2&1|
|Reid/Pedersen (Eur) v Creamer/Ernst (US) US won 5&3||Icher/Matthew (Eur) v Wie/Kang (US) Europe won 2&1|
Sunday's singles matches (times in BST)
15:31: A. Nordqvist (Eur) v L. Thompson (US)
15:42: G. Hall (Eur) v P. Creamer (US)
15:53: M. Reid (Eur) v C. Kerr (US)
16:04: C. Matthew (Eur) v S. Lewis (US)
16:15: K. Icher (Eur) v A. Yin (US)
16:26: C. Masson (Eur) v M. Wie (US)
16:37: J. Ewart Shadoff (Eur) v L. Salas (US)
16:48: C. Hull (Eur) v B. Lang (US)
16:59: C. Ciganda (Eur) v B. Lincicome (US)
17:10: F. Parker (Eur) v G. Piller (US)
17:21: M. Sagstrom (Eur) v A. Ernst (US)
17:32: E. Pedersen (Eur) v D. Kang (US)