Relieved skipper Mike Tindall hailed Ben Youngs after his late try spared England from defeat in their World Cup opener against Argentina in Dunedin.
Leicester scrum-half Youngs, a second-half replacement for Richard Wigglesworth, scored the only try of the match 12 minutes from time with England trailing 9-3 against the Pumas.
Jonny Wilkinson, who missed five penalties, kicked the conversion and unconvincing England held on for a hard-earned 13-9 victory.
Tindall paid tribute to the impact made by Youngs who was making his first appearance since undergoing knee surgery in the summer.
“Youngsy came on and turned the game for us,” Tindall told ITV. “We got our tempo going and we got a try on the back of it.
“The one thing I am going to give the team credit for is the way we stuck to our task.
“We got a win but there is a lot to work on.”
Argentina dominated the first-half and England had no answer.
“We were under no illusions about what Argentina can bring,” said Tindall. “For the first 20 minutes it is hard to play rugby when you don’t touch the ball or see it.
“We know how good their pack is and they kept the ball really well. They squeezed and squeezed and they won their penalties.
“We gave away three easy penalties away and from then on it makes it hard work for you.”
Tindall acknowledged that England will have to work hard on improving their discipline ahead of their remaining Pool B matches.
“You’ve got to play to what you are getting away with and we were not squeaky clean enough. It is something to go away and look at.”