Spain coach Vicente Del Bosque admits he would be concerned if his side lose against the Czech Republic on Friday, but made clear there is enough quality to win the Euro 2012 qualifier in Granada.
Spain lead Group I, three points above tomorrow's opposition, but they have a 100 percent win record thus far.
"A loss or a stop against them would be worrying," he told the press.
"But, I don't think we have any doubts that these points are very important. The Czechs are our biggest rivals, and so really it will be like playing a play-off tomorrow.
"If we win tomorrow then plenty has been gained."
Del Bosque said his defenders would have to be alert as he expects the Czechs to attack.
"However, they are a well organised team from what I have seen in their last three games and they have maintained good play," he said.
"Players like Rosicky moves alot with the ball, and they play well down the flanks too. They also have plenty of strength in the air.
"They are a sort of team who can create big damage with little effort. However, the feelings we have over the last few days are really good. All the players have trained well.
"Everyone is in good condition."