JASON De Vos admits Ipswich Town are stepping into the unknown for tonight's clash against FA Cup heroes Barnsley.
The Blues are in Coca-Cola Championship action at Oakwell - the scene of Saturday's famous 1-0 victory against Premier League heavyweights Chelsea.
It means the Tykes - having already won at Liverpool in the previous round - now have a much-anticipated semi-final date with Cardiff City at Wembley Stadium.
And Ipswich skipper De Vos said: "It's very difficult to know how they'll respond to what happened against Chelsea.
"They'll either be on such a high that they play with real confidence or they'll be coming back down to earth and be a bit flat.
"Either way, it's hard to predict but we mustn't concern ourselves too much.
"We've got to focus on ourselves - not them - and we know that if we go and apply ourselves then we're more than capable of getting a result."
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