Algeria coach Vahid Halilhodzic feels his side were made to pay for dropping too deep in the 2-1 defeat to Belgium.
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The African nation were on course to record a surprise Group H victory, with Sofiane Feghouli giving them a 25th-minute lead, only for Marouane Fellaini and Dries Mertens to turn the match around in the second half.
And Halilhodzic says Algeria's inability to take the game to their opponents cost them, although he believes the referee should have awarded a foul for a Kevin De Bruyne tackle on Sofiane Feghouli in the build-up to Mertens' strike.
"In the second half we let the Belgians play too much and we had to endure the game. When you do that it is quite natural that you'll concede goals," he said.
"But in my eyes Feghouli was clearly fouled and the referee had to blow the whistle.
"That did not happen, and so the Belgians were away on counter-attack. The little details that make the difference.''
Halilhodzic was full of praise for the opposition, with Fellaini's physical threat particularly impressing him.
"Despite the defeat, the players have my congratulations, because they gave everything,'' he said.
"Algeria should be proud. We should not forget that Belgium is one of the strongest teams in Europe, and is physically strong.
"Fellaini is a physically strong player and is one of the best in Europe with the head. He dominated the air and made the difference.''
Information from the Press Association was used in this report