The Three Lions only managed to beat Andorra 2-0 in Spain on Saturday.
He said: “Croatia will be another game, not like this.
“We have to play to win, always.
“I will be happy if Croatia play like Andorra! But I don’t think that is going to happen.”
On his decision to have Theo Walcott in the starting line-up instead of David Beckham Capello said: “I chose the first XI and at this moment, against this opposition, it was better to pick Walcott.
“We started very well and for about 15 minutes Walcott was incredible.
“He is dangerous, he is fast, he played well.”