Korda and Corpuz, who teamed up to win both their alternate shot foursomes matches last year, set the tone, just as US captain Stacy Lewis had wanted by sending them out first.
They were two ahead after eight and, although Hull birdied the 10th and 11th holes to draw Europe level, the Americans won three holes from the 14th to post the first red point.
“We just vibe really well,” said Korda, who plays with Megan Khang against Georgia Hall and Leona Maguire in the first match out in the afternoon fourballs (17:05 BST).
“I’ve got such a great partner. She comes up clutch every single time and I couldn’t ask for a better one.”
Behind them, Zhang and Coughlin were involved in a tight tussle with Boutier and Valenzuela with the US pair twice going one up only to see Europe immediately respond.
However, a run of three successive wins from the 12th gave the American’s daylight and when Valenzuela was too aggressive with a birdie putt on the 16th, the hole was halved in pars to add a second point to the US tally.
Ciganda and Grant were always behind after losing the first hole to Vu and Schmelzel. The Americans moved three ahead by winning the 12th and 13th holes. Ciganda holed a putt on the 14th to claw one back but could not repeat that feat on the 15th and a third red point was confirmed on the next.
Europe desperately needed the final match out on the course to stay blue. Stark and Pedersen blazed to a quick start but were left holding on down the stretch.
Ally Ewing and Jennifer Kupcho closed to two down with four to play and that was down to one after the 15th as Europe imploded. Stark missed the green with her second on the par-four hole and then Pedersen duffed a chip to 20 feet. The par putt stayed on the green to hand the US the hole.
But the Scandinavian pair held their nerve, with Stark firing her approach to the last to within three feet, which was enough to seal an important point.
As holders, Europe need 14 of the 28 available points to lift the Solheim Cup for a record fourth successive time, while the US need 14½ to earn a first win since 2017.