The Inter playmaker says there is a sense among Bert van Marwijk's squad that the players let die Mannschaft win on Wednesday, but vows to keep on fighting for qualification.
Bert van Marwijk's men sit bottom of Group B, having also lost their opening game to Denmark, and the Inter playmaker felt that Oranje were the authors of their downfall against their arch-rival on Wednesday evening.
"I do apologize to everyone for everything," he told De Telegraaf. "This is very hard. We didn't see this coming. There is a real sense that we let the Germans win."
However, Sneijder insisted that his teammates were focused on securing progression to the next round, which a two-goal victory over Portugal would achieve, assuming Germany beats Denmark.
"It was hard," he continued. "We have now lost twice, but we still have a chance. We need to keep believing in it.
"I actually thought we were out. I hadn't thought much about the scenario as it stands. I realize that if we beat Portugal, we still have a chance. We need to go for it."
Netherlands and Portugal kick off at 2:45 p.m. ET on June 17 at Kharkiv's Metalist Stadium.
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