Juve were dumped from the Champions League after just one victory in six group games, earned at home to bottom club Copenhagen.
"The regret remains that we compromised qualification with the opening two matches of the group," said Chiellini.
"Now the Europa League must give us the push to continue our growth process. After all, last season Chelsea were eliminated from the Champions League and went on to lift that trophy.
"It is too early to talk about the fact the Final will be in Turin, because there is such a long way to go including the Serie A and Coppa Italia fixtures.
"It will be important to reach the European games with the right mentality and concentration."
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