Although Germany proved too strong on home soil, winning through a goal from Bayern Munich's Mario Gotze, Sampaoli felt Chile gave a good account of themselves.
"It is very important that we have played such a team on their home pitch, and that we have dominated 80 per cent of the match, creating more than 12 scoring chances," he said.
"The result does not reflect the game. We were on top. We are sure of what we do, we are not improvising.
"If we arrive at the World Cup playing as we are now, we can get to through the next round."
Across the border in Austria, Uruguay played to a 1-1 draw.
They fell behind to an early Marc Janko goal and Fernando Muslera had to be alert to keep out David Alaba's free-kick before the break.
But Uruguay soon began to test Robert Almer, who denied Luis Suarez one on one and then kept out Christian Stuani's back-heel before Alvaro Pereira netted the equaliser.
"In the first half they were coming at us from all angles," said Muslera. "It was incredible how they were handling the ball. But we managed to close down the spaces and improve greatly."
Colombia recorded a 1-1 draw with Tunisia in Spain, despite finishing the match with 10 men.
Colombia started the stronger and James Rodriguez put them ahead from the penalty spot in the 19th minute, but Tunisia grabbed a somewhat fortuitous equaliser when Colombia goalkeeper David Ospina collided with Mario Yepes and Whabi Kharzi was able to roll the ball into the net.
Amaranto Perea was then sent off 10 minutes from time for a second bookable offence.
"It was a friendly but a hard, intense match," said Colombia coach Nestor Pekerman. "We have several chances to score, but Tunisia closed the game and we lost our shape after their goal."
In London, Ecuador staged a remarkable comeback as the 10 men of Australia squandered a 3-0 lead to lose 4-3.
Australia looked like running away with it as Tim Cahill scored either side of a Mile Jedinak penalty.
But after Fidel Martinez had pulled one back for Ecuador, Australian goalkeeper Mitchell Langerak was sent off for a foul on Enner Valencia, and Segundo Castillo scored from the resulting penalty.
Enner Valencia then turned in a cross from his namesake Antonio Valencia to level it and then, as the match moved into stoppage time, Edison Mendez completed a remarkable turnaround.
"We achieved an important result as we came from behind," said coach Reinaldo Rueda. "It is a good lesson to us as it shows us we cannot start matches with such a passive attitude and allow our opponents to play their game."
Jerry Bengston's brace gave Honduras a 2-1 win over Venezuela, with Romulo Otero scoring Venezuela's goal.
Joel Campbell and Alvaro Saborio were on target for Costa Rica in a 2-1 win over Paraguay, while Mexico and Nigeria played out a goalless draw in Atlanta.