Team GB women's football coach Hope Powell knows the home side cannot afford to take New Zealand lightly in today's Olympic Games opener at the Millennium Stadium.
Team GB women's football team take on Sweden in a pre-Olympic friendly
Hope Powell's side play New Zealand in their first match of London 2012 on Wednesday.
Team GB will start as favourites against the Football Ferns as they get Group E under way in Cardiff, with the Kiwis having never won a game at an Olympics or a World Cup finals.
But New Zealand have made big strides over the last 12 months, pushing world champions Japan and Powell's England side close in the group stages of last year's World Cup in Germany.
And the GB boss knows her charges cannot afford to underestimate their opponents if they want to give the host nation a victory in the first sporting action of the 2012 Games.
"They have done a lot of work in the last 12 months," said Powell.
"We played them in the World Cup as England and they were a tough proposition and they are vastly improved.
"They worked really well throughout the game we faced them in, they brought a lot of pressure and they will run and run and run for 90 minutes.
"In all areas they are really striving to improve their game and they are getting better technically, so the game is a big challenge and we are expecting a tough encounter as they are quite strong in all areas."
A crowd of more than 35,000 is expected for the fixture, and Powell believes that figure is a sign of the growing popularity of the women's game.
"It is great, that's fantastic and is a great achievement.
"It means a lot for people to come and support the girls and hopefully by Wednesday we can get a few more tickets sold. It's a privilege to play in front of a crowd like that and it shows that people want to come.
"The crowd will be behind us and hopefully we can push on and get a victory."
New Zealand coach Tony Readings, meanwhile, is honoured that his side will help to get the Olympics under way, and is hoping the pressure of the occasion for the home side will allow his team to capitalise.
He said: "We are playing the host nation and it is something to look forward to.
"We are always proud to pull on the shirt and represent our country, but to be the first athletes to represent our country is something we are really looking forward to.
"There could be added pressure on our opponents going into this game in front of an expectant home crowd, but for us it's another game of football.
"We have played in front of big crowds at World Cups and we are used to playing most of our games away from home."
The other Group E match sees Brazil and star forward Marta, silver medallists in Beijing four years ago, face Cameroon, who will be making their Olympic debut.
