Thomas Bjørn insists Europe must not become complacent as they look to regain the Ryder Cup at Le Golf National.
The Dane's side hold a 10-6 advantage heading into Sunday's singles after winning Saturday's fourballs 3-1 and then splitting the afternoon foursomes 2-2.
But Bjørn expects the United States to come out all guns blazing in the singles.
“Today was good,” he said. “It was all the things that we talked about last night, they took in and they came out hard this morning and did brilliant, they really did.
“It's been two great days, and a nice little chat in that locker room now, and turn it around and get ready for tomorrow.
“We have a goal, and that is to try to win this trophy, and that's where the focus stays. I've said all along, I focus on the 12 players that is in our side, but we are so well aware of what's standing across on the other side. Very capable and the greatest players in the world.
“We have to regroup and we look to tomorrow, and I would never get ahead of myself in this.”
Bjørn was part of the European team who won by a single point at Valderrama in 1997 despite holding a five-point lead ahead of the singles, and also pointed to the US winning having been 10-6 behind at Brookline two years later and Europe's Miracle at Medinah in 2012 as reason to be cautious.
“You keep reminding yourself that we had a big lead at Valderrama; we had a big lead at Brookline, and at Valderrama, we won, but only just. At Brookline we lost. At Medinah we were a long way behind and we turned it around.
“So in history, history will show me and everybody on that team that this is not over. That's what it's all about. You go full bore tomorrow. Get out there and do all the right things, and this is not over till you've got the points on the board.”
Bjørn has opted to send Rory McIlroy out first in the singles, with the Northern Irishman facing Justin Thomas.
“There's a lot of reasons to send Rory out first,” Bjørn added. “He's a fantastic player. He likes to play fast. He doesn't like to be held up. He likes responsibility.
“He feels like he's in a place where he can go into that position and get the best out of himself.
“In the end, somebody's got to go there. I have a lot of belief in him, and I trust him as a player, but also trust him very much as a person.”