Juve thrashed Dinamo 4-0 on Tuesday night.
“The initial idea was to try to maintain a clean sheet until half-time, but we didn't manage it," said Sopic.
“Juve were immediately aggressive and pinned us back. We were unable to react right from the start.
“I already said yesterday that Juventus have the potential to win the Champions League and that's the impression I have now too.
“The physical condition of the Bianconeri will be decisive in the Spring. We could only hold out so much, as our defence was playing against the best of the best, so I'm not worried."