On Thursday 7 December 2023, the seminar 'Parallel Enforcement? Between DMA and Competition Law" was organised by the Centre for Antitrust and Regulatory Studies of the University of Warsaw. The seminar included a guest lecture by Professor Alexandre De Streel, a well-known expert on regulation and competition policy in the digital economy, followed by a discussion with the participants. The seminar was moderated by Maciej Bernatt.