Sources: Football is http://commons.wikimedia.org/wiki/File:Trunc-icosa.jpg but cropped to only have the round football (Public Domain)
Font is http://www.dafont.com/samba2.font?psize=l&text=Brasil
I tried resizing this image with Nearest Neighbor to 16x16 in Paint.NET 4.0.5226.41987: This is the result:
It's clearly not right. What's the problem?