127In that regard, the Court has held that, subject to proof to the contrary, which the economic operators concerned must adduce, it must be presumed that the undertakings taking part in the concerted action and remaining active on the market take account of the information exchanged with their competitors in determining their conduct on that market. In particular, the Court has concluded that such a concerted practice is caught by Article 81(1) EC, even in the absence of anticompetitive effects on the market (judgment in T-Mobile Netherlands and Others, C‑8/08, EU:C:2009:343, paragraph 51 and the case-law cited).
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