The World Cup ball has been slammed by players competing at the World Cup.
But Czech Republic No1 Cech said: "I played with the ball for Czech Republic against Turkey and I found the ball fine.
"There was no problem. Of course, everybody has their own opinions.
"You see during a normal season similar mistakes, but you don't blame the ball then.
"Suddenly we come to a big event and when there is a mistake, someone loses the ball or loses his concentration and everybody looks to the ball. I don't think it is the right attitude.
"The ball is the same for everyone. It depends on many things - like the weather, the way the ball is kicked, the part of the pitch it bounces on and many more reasons. My experience has been positive."