Graeme McDowell and Rory McIlroy have beaten Zach Johnson & Hunter Mahan 3 & 1 to tie the Ryder Cup at six points apiece.
Three up overnight, the Irish pair suffered an immediate body blow when Johnson holed from 30 feet across the eighth green with the first shot of the day.
They hit back with a birdie on the 11th to restore their cushion, only for Johnson to hole another 30ft birdie putt on the 16th to keep the match alive.
McIlroy finished it in style on the next however, a birdie two sealing a vital win and levelling the overall score.
``This session is huge,'' McIlroy said.
“If we can go 8-8 into the singles that’s huge compared to 9-7 down, and after going out 6-4 behind if we can get any sort of lead it would be massive.”
Padraig Harrington & Ross Fisher 2 up on Jim Furyk & Dustin Johnson (15)
Peter Hanson & Miguel Angel Jimenez A/S Bubba Watson & Jeff Overton (14)
Edoardo Molinari & Francesco Molinari 1 down to Stewart Cink & Matt Kuchar (13)
Ian Poulter & Martin Kaymer A/S Phil Mickelson & Rickie Fowler (13)