Coach Pia Sundhage has warned
The United States booked a place in the semi-finals with a 2-0 victory over
Goals from striker
Sundhage said: "This team since 2008, and I guess before, has been winning so many games, so of course they have been living with the pressure.
"I just look at the team and it feels like they perform under pressure - they like the pressure. The harder it is, the more you get out of the team, almost.
"I think that actually is unique. The US team - and not only this team, you go back to '91 - deals very well with pressure."
Wambach's 27th-minute strike was her fourth in as many games, leading
Asked about her influence, Sundhage said: "Everything she does on and off the field, she does lead this team.
"If you look at the game today, she scored a goal - huge - so she is in a good place, that's for sure."
New Zealand will head home pleased with its showing at the London Games and confident that its conquerors will go all the way.
Readings said: "When you look at the American team, they are very hard to stop because they have got so many threats in the team.
"You have got those two up front (Wambach and
"You have got (
"There are lots of goal scoring threats. They are the sort of team that, if they let in two, they will score three. They can find another gear when they need it and score some goals."
A US man trying to dribble a football 16,000 kilometres to Brazil in time for the 2014 FIFA World Cup has died after being hit by a pickup truck on the Oregon Coast.