Asamoah, Ghana's Middfielder had doubts last time that the home advantage has anything to do with the victory.
The next seven days will see the tournament reach its business end and after struggling through the first round, the Black Stars will be desperate to make an impact after a frustrating build-up marred by injuries to several key players.
After Gyan and Annan passed the fit, Essien had last time also been injured.
Despite anticipating a tough match, Asamoah believes the west Africans are capable of silencing the Estadio do Novembre 11 and counted back to a recent friendly between the two sides that ended in a goalless draw.
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