Bradford goalkeeper Matt Duke said the 3-1 win over Aston Villa in the League Cup semi-final first leg felt "unreal".
The 35-year-old pulled off a string of saves as the League Two side recorded a famous victory at Valley Parade.
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"It is unreal. I can't believe we beat them. We thought we could get something but a 3-1 lead is fantastic," he said.
Bradford are seeking to become the first team from the fourth tier of English football to reach the final of the League Cup since Rochdale in 1962.