Brazil defender Danilio says his team is still improving, and that could be troubling for Mexico in the semifinals of the Under-20 World Cup.

Brazil defeated Spain on penalty kicks in the quarterfinals after a 2-2 draw through extra time. It may have been the best match of the tournament, featuring end-to-end attacking, dominant possession and two of the world's best young goalkeepers.

If Brazil gets better, Mexico faces a rough road Wednesday. France and Portugal meet in the other semifinal, with the winners advancing to Saturday's final in the Colombian capital of Bogota.