Wales boss John Toshack knows after the 2-0 victory over Liechtenstein that his side must raise their game when they face Germany in a tough World Cup qualifier on Wednesday.
David Edwards and a deflected Ched Evans header gave Wales their second Group Four win, at the Millennium Stadium.
But Toshack said: "We will have to be better in Germany. We are very aware of that."
He added: "The game was as difficult as I expected. But we had chances, scored twice, missed a penalty and fully deserved to win. We were the better side and should have won by a couple more."
Craig Bellamy's missed penalty was the third by a Wales player in successive matches.
Toshack said: "Craig was confident - he wanted to take it. But their goalkeeper was their best player on the night and made a lot more saves.
"It seems every goalkeeper who comes to this stadium plays very well.
"Liechtenstein had a couple of chances - they worried us - but I am pleased we have six points so far.
"We have two massive games now in March at home to Finland and Germany. That is where we will have to pick up some points if we are to qualify."
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