Croatia coach Slaven Bilic admitted Wednesday's humiliating 5-1 defeat to England had been like a nightmare for him.
The result leaves the Croats struggling to qualify for next summer's World Cup Finals in South Africa after Ukraine's goalless draw with Belarus left them in a strong position to finish as group runners-up.
A stunned Bilic said: "We didn't expect such a crushing defeat.
"Not in our worst nightmares were we expecting this. It was not a normal defeat. It was humiliation. They played fantastically from the start.
"Even before the first goal, they looked the sharper, more aggressive side. Simply the better side.
"We were very happy at half-time that it was only 2-0 because, without our goalkeeper, it could have been five. Our goalkeeper was brilliant. But, in the end, they destroyed us.
"They (England) can definitely win the World Cup. Definitely. It's not easy to play every game like that, but they did not misplace a pass in the first half-hour. All their passes were dangerous, one-twos, perfect.
"If they play like that, then of course they can win it."