After winning her seventh consecutive medal at the World championships of Budapest 2017 Pellegrini decides to allow herself a sabbatical with milder training and partial abandonment of her beloved 200m freestyle. And this is how at the European Championships in Copenhagen in December 2017 as individual competitions she participates in the 100 m freestyle which she finishes in seventh position in the final, and in the 100 m backstroke where she does not qualify for the final swimming only the tenth time of the semifinals. The only satisfaction of this review is the bronze medal in the 4x50 mixed freestyle relay.