Scamacca and Ederson had La Dea 2-0 ahead before they were pegged back by Verona.
Scamacca said: "There are many aspects to improve on. Tonight I made some wrong choices, where I played the ball first instead of keeping it. It was a shame, it seemed like we had the three points in hand.
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"I've had some complicated months, I've always worked and when you work your moment comes."
Asked about scoring at Liverpool last week, he added: "Winning 3-0 isn't something that happens often. On Thursday (in the Europa League quarterfinal second-leg) we have to think about being 0-0, we need to be determined. It will be a fundamental match for us."