The combination of Dustin Johnson and Collin Morikawa has proved huge for the United States, as it moved closer to securing the Ryder Cup at Whistling Straits in Wisconsin.
Johnson and Morikawa won twice - in foursomes and four-ball - as the US team holds an 11-5 advantage over the Europeans through two days.
The US needs three-and-a-half points on the final day of singles matchplay to reclaim the Cup.
The Europeans had their best session to wrap up Saturday's play by splitting four-afternoon matches, keeping the match alive.
Johnson and Morikawa secured a 4 and 3 victory v Ian Poulter and Rory McIlroy in the afternoon.
They also won an alternate-shot match on day one to account for three points.
Saturday's sessions concluded with Scottie Scheffler and Bryson DeChambeau of the US rallying by winning four straight holes on the back nine for the 3 and 1 triumph against Tommy Fleetwood and Viktor Hovland.
Brooks Koepka and Jordan Spieth rallied from three down to tie on the 13th hole only to have Europeans Jon Rahm and Sergio Garcia go back ahead two holes later and then extend the margin on the 16th, in the eventual 2 and 1 result.
Europe's Shane Lowry and Tyrrell Hatton topped Tony Finau and Harris English by 1-up.
Earlier, The US stretched its lead to 9-3 through morning foursomes, winning three of the four matches.
The only stumble came when Rahm, who has been stellar for the Europeans, and Garcia knocked off Koepka and Daniel Berger 3 and 1.
The big boost for the Americans came from Justin Thomas and Jordan Spieth, who trailed by three after six holes.
They won four of the last five holes, capped by a par on the 18th, where the Europeans recorded a bogey, in the duo's 2-up victory.
The other two morning matches ended after 17 holes in 2 and 1 results. Johnson and Morikawa defeated Paul Casey and Hatton, while Xander Schauffele and Patrick Cantlay took down Lee Westwood and Matt Fitzpatrick.
