An adviser to the European Union's second-highest court has backed the decision to designate TikTok as a "gatekeeper" under the Digital Markets Act, delivering a setback to the platform's effort to escape the EU's strictest rulebook for large digital platforms.

The opinion comes from an advocate general attached to the EU court handling TikTok's challenge to its designation by the European Commission. It is not a judgment. It is, however, a reliable weather vane, and the forecast for TikTok is grey.

The court's judges follow advocate general advice in the substantial majority of cases, even though they remain free to disregard it. A final ruling will follow in due course.

What did the adviser decide?

The adviser concluded that the Commission acted within its powers when it labelled TikTok a gatekeeper. That label carries weight. Under the Digital Markets Act, gatekeepers must observe obligations covering data sharing, interoperability, self-preferencing and the mixing of personal data across services.

TikTok had argued against the designation. The adviser did not agree. In the procedural hierarchy of Luxembourg, that disagreement matters more than a press release ever will.

The opinion is advisory. The judges of the court have not yet spoken. But when an adviser sides with the regulator, the appellant's odds shorten considerably.

What does the gatekeeper label require?

The Digital Markets Act, the EU's flagship competition statute for digital markets, imposes conduct rules on platforms deemed sufficiently large and entrenched to act as gateways between businesses and users. Designation depends on user numbers and turnover thresholds, subject to the Commission's assessment.

Once designated, a platform loses a degree of commercial freedom. In exchange, the Commission gains a degree of supervisory reach. The legislation was designed for exactly this trade.

TikTok's challenge targeted the designation itself. If the opinion holds and the court concurs, the obligations stay. TikTok remains on the register of gatekeepers alongside the other major platforms the Commission has caught in the same net.

Why does an advisory opinion matter?

Advocate general opinions carry no binding force. The court can depart from them, and occasionally does. Yet the statistics favour the adviser: across the EU court system, judges concur with their advisers' essential reasoning in most cases.

For practitioners, the practical reading is straightforward. Litigation risk on this designation has shifted. Companies advising clients with pending DMA challenges should note that the court's advisory machinery has now signalled a pro-Commission direction on at least one platform's appeal.

The consequence is not merely reputational. It shapes settlement posture, compliance budgets and the timing of any further appeals to the Court of Justice, the EU's highest court, which sits above the tribunal now considering TikTok's case.

What happens next?

The court will deliver its judgment in the coming months. Three outcomes were theoretically available to TikTok: a win, a loss, or partial relief. The adviser has now nudged the probabilities firmly toward the second.

Should the judges agree, TikTok's route onward runs to the Court of Justice on points of law. That road is long, and the obligations apply in the meantime. Compliance, in other words, does not pause for litigation.

For the Commission, the opinion is quiet vindication. For TikTok, it is a procedural pothole rather than a dead end, though potholes of this size tend to damage the suspension.

The takeaway in plain words: TikTok's bid to shed its EU gatekeeper status has run into an adviser's opinion in the Commission's favour; the judges will decide, but the wind now blows against the platform.

By Amara Osei, Global Law Wire