How do I get tickets for Copa do Brasil (Corinthians) online?

[Olympique_de_Marseille]

How do I get tickets for Copa do Brasil (Corinthians) online?

 

 

http://globoesporte.globo.com/futebol/copa-do-brasil/noticia/2015/08/cbf-divulga-datas-e-horarios-dos-jogos-das-oitavas-de-final-da-copa-do-brasil.html

 

 

I want to go to to the game on Wednesday August 26th at Corinthians in São Paulo.

 

Should I just wait and walk up and buy my ticket on gameday?

[Blackdude]

I've talked to someone who has been at Fluminense game, so it's totally different. It's relatively easy to go in person.