Zimbabwe skipper Sikandar Raza described their stunning 23-run win over Australia as “unbelievable”, saying the culture, unity and environment built within the squad made the result possible.

Zimbabwe shocked Australia in their Group B clash of the T20 World Cup at the R Premadasa Stadium here on Friday, successfully defending 169-2 as the heavyweights folded for 146 in 19.3 overs.