Europe grabbed a 5.5-2.5 lead over the United States after the completion of Friday's opening day of matches in the 45th Ryder Cup at Bethpage Black.
The Europeans seized a 3-0 lead for the first time on US soil on the way to a 3-1 lead after morning foursomes (alternate shot) matches.
In the afternoon, four-ball (best ball) matches, which US President Donald Trump watched from the first tee, there was little US improvement.
In four-balls, Americans Justin Thomas and Cam Young routed Ludvig Aberg and Rasmus Hojgaard 6&5.
Europe's Jon Rahm and Sepp Straka beat top-ranked Scottie Scheffler and J.J. Spaun 3&2.
Englishmen Justin Rose and Tommy Fleetwood edged Bryson DeChambeau and Ben Griffin 1-up.
Sam Burns and Patrick Cantlay tied Shane Lowry and Rory McIlroy.