Gleneagles - Americans Jordan Spieth and Patrick Reed defeated European pair Thomas Bjorn and Martin Kaymer 5 and 3 in the third Saturday fourballs match at the Ryder Cup.
The win made it two out of two for the new combination and cut Europe's overall lead to 6-5.
The Europeans, who halved their fourballs match Friday, got off to the perfect start with birdies at the first from Kaymer and third from Bjorn, pushing them into an early lead.
But that advantage vanished in the space of two holes as the Europe duo made a mess of the tough fifth hole and Spieth, at 21 the youngest player at Gleneagles, sunk a long-range effort at the next.
Spieth struck again at the ninth with a 15-footer for birdie to send the Americans round the turn at 1-up.
They then ran away with the match, taking birdies at 11, 13, 14 and 15 as the European challenge faded fast.
Spieth became the youngest player to win two Ryder Cup matches at the age of 21 years and 62 days, whilst he and Reed were the first rookie pairing to win their first two matches in 25 years.
Results after Saturday's morning fourball matches at the 40th Ryder Cup:
Europe 6 1/2 United States 5 1/2
Justin Rose/Henrik Stenson (Europe) bt Bubba Watson/Matt Kuchar (USA) 3 and 2
Jim Furyk/Hunter Mahan (USA) bt Jamie Donaldson/Lee Westwood (Europe) 4 and 3
Patrick Reed/Jordan Spieth (USA) bt Thomas Bjorn/Martin Kaymer (Europe) 5 and 3
Rory McIlroy/Ian Poulter (Europe) halved with Jimmy Walker/Rickie Fowler (USA)
Jamie Donaldson/Lee Westwood (Europe) bt Jim Furyk/Matt Kuchar (USA) 2-up
Justin Rose/Henrik Stenson (Europe) bt Hunter Mahan/Zach Johnson (USA) 2 and 1
Rory McIlroy/Sergio Garcia (Europe) halved with Jimmy Walker/Rickie Fowler (USA)
Victor Dubuisson/Graeme McDowell (Europe) bt Phil Mickelson/Keegan Bradley (USA) 3 and 2
Justin Rose/Henrik Stenson (Europe) bt Bubba Watson/Webb Simpson (USA) 5 and 4
Jordan Spieth/Patrick Reed (USA) bt Stephen Gallacher/Ian Poulter (Europe) 5 and 4
Thomas Bjorn/Martin Kaymer (Europe) halved with Rickie Fowler/Jimmy Walker (USA)
Keegan Bradley/Phil Mickelson (USA) bt Sergio Garcia/Rory McIlroy (Europe) 1-up