Wales manager John Toshack feels he got the blend of youth and experience right in the 0-0 Paraguay draw in Cardiff.
Toshack is building towards the Euro 2008 qualifiers
"Lewin Nyatanga played 90 minutes, didn't look out of place, was calm and collected and can be pleased," he said.
"Maybe we got that out of him because we had Paul Jones in goal. There was a lot of inexperience in the back line so Jones got the nod over Lewis Price.
"Lewis has only played one game in three months for Ipswich. We have to slowly push these youngsters through."
Toshack feels that his preferred 3-5-2 formation is bedding in well, although his players need more time to adjust to the attacking demands it places on certain areas.
"It's a system that's foreign to most of my players who are used to 4-4-2 and straight lines, but they performed well with it," Toshack told BBC Sport Wales.
"We have to do more moving forward from full-back and show more creativity.
Toshack says Koumas took time to settle in midfield
"In midfield Simon Davies and Jason Koumas took a while to get into the game, and up front Ryan Giggs and Craig Bellamy didn't hit it off as well as they have done in the past.
"We know what we have to do, and we know how difficult it is going to be.
"The team has to have more than one way of playing. You can't do the same thing against the likes of Germany and the Czech Republic as you do against Cyprus or San Marino.
"You always like to win, especially at home, but under the circumstances we can be reasonably pleased with the draw."
Paraguay boss Anibal Ruiz was reluctant to discuss his country's World Cup finals clash with England, but said: "It was important that we did well in this match and learned about playing British-style sides.
"Wales' goalkeeper was outstanding, he made a lot of very good saves to stop us from winning.
"We need more games like this, the Wales match was the first of our World Cup build-up and we will be ready for out first match in Germany against England.
"But for now we will continue to build for the finals, and there is still plenty of time to get our team to the level we want."