Arsenal midfielder Tomas Rosicky is weary of the threat posed by Scotland in Euro 2012 qualifying following the Czech Republic's 1-0 friendly defeat against Craig Levein's men at Hampden Park last Wednesday.
The Ex-Borussia Dortmund playmaker has consequently warned his nation it should be concerned upon returning to Scotland following last week's a tough loss.
He said: "We should definitely worry about coming back here. It's a tough place to come and play and they don't give you anything for free.
"But I'm happy we created some chances and don't have to be ashamed of the result or the performance because we played a solid game," he continued.
"We didn't want to lose but I think there was a lot of positive play from us which we can build on. We have to stay positive.”
With the Czechs failing to qualify for the World Cup this summer after finishing behind both Slovakia and Slovenia in UEFA qualifying, the focus will soon turn to Euro 2012 in which their qualifying group comprises of Scotland and defending champions Spain.