Costa Rica played the United States women's national team to a goal-less draw on Tuesday in the Americans' sendoff match before departing for the Paris Olympics.
US captain Lindsey Horan told a crowd of nearly 19 000 spectators they were undaunted about their chances in France despite the draw.
"We wish we would have gotten the win," she said. "But we're going to go out and do our thing at the Olympics. This team is amazing. We're going to represent this country so well and we'll do everything possible to being back a gold medal."
Costa Rica goalkeeper Noelia Bermudez and a swarming defensive effort frustrated a patient US squad to earn the Ticas a draw after losses in their first 17 matches against the Americans.
The US women outshot Costa Rica 26-2, forcing 12 saves from Bermudez and taking all 16 corners in the match.
"It takes a lot of patience to play against a low block. Costa Rica did it really well," US midfielder Sophia Smith said. "It was definitely challenging for us but it was a good test because we're going to face that in the Olympics.
"I know we can create chances. We created I don't know how many chances tonight. It's getting one in the back of the net, no matter how that looks. That will come."
While it was a disappointment against a defensive-minded squad for new coach Emma Hayes and her US team, it showed the Americans what they need to do before they start to play for gold next week in France.
"That was a big message from Emma at the end of the game – don't be frustrated," Smith said. "We wanted a result from this but these games are preparation for something bigger.
"We need to peak when we need to peak and that's at the start of the Olympics. We're calm about it. We're not frustrated. We trust the process. We know things will go our way when we need them to."
The American women begin Olympic Group B play on July 25 against Zambia at Nice and also face Germany and Australia in group matches at Marseille.
"I think it's going to be amazing," Smith said. "I'm so excited to be going with this group. I'm excited to get the ball rolling in France. This group has a lot of potential and good things in store."
The United States have won four Olympic women's football titles – in 1996 on home soil and three in a row in 2004, 2008 and 2012.
US midfielder Rose Lavelle, who helped win the 2019 Women's World Cup in France, was a late scratch from the match due to leg tightness. Korbin Albert replaced her in the US starting line-up.
HAYES: 'GOOD PROGRESS'
The Americans have three wins and a draw without surrendering a goal under England's Hayes.
"I think we've made good, nice progress," Hayes said. "When you take over a team and you've got to implement quite a lot, they have adapted to those ideas really well.
"We're going into the Olympics with an idea of what we look to do most of our moments but now we're starting to add some adaptations."
Smith and Mallory Swanson were each denied on early chances by Bermudez while Trinity Rodman was offside on another US opportunity.
Bermudez and Rodman collided as the keeper denied Horan in the 24th minute. Bermudez also grabbed a Horan header in the 40th minute and thwarted Smith shortly before halftime.
Bermudez batted away a Smith chance in the 49th minute and deflected Horan's kick in the 50th to keep Las Ticas level.
Horan found the net in the 55th minute only for the offside flag to be raised.
Bermudez deflected away a Rodman pass in extra time and Horan nodded a header over the crossbar in the final seconds.