On 15 October 2014, the European Commission adopted a decision finding that Slovak Telekom breached Article 102 TFEU for its refusal to provide unbundled access to its local loops, as well as its margin squeeze of alternative operators in the provision of unbundled access to its local loops. On 13 December 2018, GCEU adopted its judgement on the appeal brought by Slovak Telekom. The GCEU confirms the Commission’s decision that the Slovak Telekom had breached Article 102 TFEU by engaging in constructive refusal to supply and margin squeeze. This paper reviews the main arguments that ST raised in its appeal against the Commission decision, and analyses the response of the GCEU to these arguments, and in the process provides commentary and critique on the GCEU judgment. It argues that this judgement is a missed opportunity as it fails to engage with the fundamental issues of principles raised by Slovak Telekom in its appeal.