47As the Advocate General observed, in essence, in point 23 of his Opinion, when taking such a decision, a competition authority must assess, on the basis of all the specific circumstances of the case, whether, by resorting to methods different from those governing normal competition in products or services, the conduct of the dominant undertaking has the effect of hindering the maintenance of the degree of competition existing in the market or the growth of that competition (see, to that effect, judgment of 25 March 2021, Deutsche Telekom v Commission, C‑152/19 P, EU:C:2021:238, paragraphs 41 and 42). In that respect, the compliance or non-compliance of that conduct with the provisions of the GDPR may, depending on the circumstances, be a vital clue among the relevant circumstances of the case in order to establish whether that conduct entails resorting to methods governing normal competition and to assess the consequences of a certain practice in the market or for consumers.
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