Judgment_paragraph 110 · Slovak Telekom, a.s. v European Commission (C-165/19 P)

110In addition, in order to assess the lawfulness of the pricing policy applied by a dominant undertaking, reference should be made, as a general rule, to pricing criteria based on the costs incurred by the dominant undertaking itself and on its strategy. In particular, as regards a pricing practice which causes the margin squeeze of its competitors, the use of such analytical criteria can establish whether the dominant undertaking itself would have been sufficiently efficient to offer its retail services to end users otherwise than at a loss if it had first been obliged to pay its own wholesale prices for the intermediary services (see, to that effect, judgment of 14 October 2010, Deutsche Telekom v Commission, C‑280/08 P, EU:C:2010:603, paragraph 201, and judgment in TeliaSonera, paragraphs 41 and 42 and the case-law cited).