The United States lead Europe by 11 points to 5 going into final day of the Ryder Cup at Whistling Straits in Wisconsin.
Both teams shared the spoils in the fourballs last night, with Shane Lowry holing a putt to win his match.
The Americans require 14 and a half points to regain the trophy.
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There are 12 singles matches down for decision, with the first one starting just after 5pm Irish time.
No team has made up a deficit of six points on the final day.