The U.S. women's national team opened up the Summer Olympics with a 2-0 win over New Zealand on Wednesday, but that wasn't without something odd happening.

If you haven't heard about the Zika virus by now, where have you been? Zika, an illness transmitted mainly from mosquito bites, has been linked to microcephaly in newborn babies, with Brazil as the epicenter. As a result, some U.S. national team members expressed concern with going to Brazil for the Summer Olympics.

U.S. goalkeeper Hope Solo has been vocal about it, even suggesting earlier in the year that she could skip the games. And then she tweeted this in July:

And the fans didn't like it. Listen as they yell "ZIKA!" to Solo when she gets rid of the ball, which got some interesting reactions online. They also booed and whistled when she had the ball.

Solo was asked after the game about it, and she said it didn't bother her, saying she would prefer that than silence.

But still an awkward, uncomfortable chant from the fans. Don't be shocked if she responds rather strongly, and don't put it past her to walk onto the field with that gear in her tweet above.

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