Brazil coach Dunga blamed Portugal for what he considered negative tactics after the dismal 0-0 draw which ensured both sides reached the last 16.Hopes had been high for a display of attacking verve, but both teams tackled cynically and were booed off in Durban. I'm not happy, Dunga said. We always play to win.We even tried to attack in the last five minutes.Portugal didn't attack.They just want