Odette CaplanWhen millions of US fans open their prediction market apps for tonight's Guadalajara vs. Querétaro Liga MX Apertura clash, a federal courtroom in New York is already asking whether those markets should be allowed to exist at all.
Four days ago, on September 22, 2026, the Mexican Football Federation (FMF) filed a trademark-infringement lawsuit against Kalshi Inc. in the U.S. District Court for the Southern District of New York, case number 1:26-cv-08259. The complaint, filed under the federal Lanham Act, charges that Kalshi illegally exploited the "Liga MX" trademark, club names, and logos — including those of Guadalajara and Querétaro — to promote and operate prediction market contracts without any commercial agreement with the league.
The timing is not accidental. As of the filing date, Kalshi listed 13 active Liga MX markets on its platform: nine individual match contracts (including tonight's Guadalajara vs. Querétaro game), three futures markets, and one league-leader market. The FMF is asking the court for a temporary restraining order, preliminary and permanent injunctions, and damages covering all profits Kalshi earned from the alleged infringement.
The Dispute Behind Tonight's Match
The FMF–Kalshi conflict has been building since July. On July 17, the federation's general counsel sent Kalshi a cease-and-desist letter demanding it stop using the Liga MX brand identity across its platform. Kalshi responded four days later, invoking the doctrine of "nominative fair use" — a legal argument that permits referencing a trademark when it's the only practical way to identify the subject of a commercial transaction. Kalshi removed some logos and added disclaimers but kept all Liga MX markets operational.
The FMF rejected that position and escalated. The case will likely hinge on whether labeling a prediction contract "Guadalajara vs. Querétaro" constitutes protected fair use — identifying a publicly known fact — or unauthorized commercial exploitation of protected marks. Kalshi is expected to cite DraftKings' successful defense against the NCAA in a similar dispute, where courts found that identifying the subject of a wager requires using associated marks. Legal observers note that the CFTC has separately flagged prediction market manipulation risk in recent regulatory guidance, adding a second front of scrutiny to platforms operating Liga MX contracts.
The federation wants the court to act before the Liguilla playoff bracket is set. A TRO can be issued within 24 to 72 hours in emergency circumstances without a full hearing — meaning Kalshi's Liga MX markets could be enjoined before the current Apertura stage concludes.
Why the Official Partnership Split Changes the Risk Calculus
Not every platform offering Liga MX prediction markets carries the same legal exposure. In June 2026, Liga MX signed a formal sponsorship agreement naming Polymarket as its exclusive prediction market partner in the United States. The deal is backed by Genius Sports, Liga MX's official data and integrity partner, which supplies verified match data for contract settlement and maintains an integrity information-sharing process with the league.
For users on Polymarket, the infrastructure is straightforward: official data resolves contracts, the league's integrity unit monitors markets for manipulation, and no pending litigation threatens platform continuity. For users on Kalshi, none of those assurances apply — and as of September 22, an active federal injunction request is working its way through a New York court.
This is the kind of jurisdictional and contractual detail that shapes what happens when something goes wrong — and where professional legal advice matters most.
For more on how US state tax rules intersect with Liga MX betting income, see Monterrey vs. San Luis: The Liga MX Betting Tax Trap US Fans Should Know.
What a TRO Actually Means for Open Contracts
Here is where a sports and gaming attorney can give you clarity that no prediction platform's FAQ will provide. If the court grants a temporary restraining order against Kalshi's Liga MX markets, the outcome for users with open contracts depends on three intersecting factors: the specific wording of the injunction, Kalshi's user agreement, and the consumer protection statutes in your state.
In some injunction scenarios, platforms are ordered to cease operating new contracts while existing positions are settled at current market value. In others — particularly if the injunction is broad enough to constitute a platform-wide operational halt — open contracts may be frozen pending compliance review. In the worst-case scenario, if Kalshi faced a court-ordered asset restriction as part of expanded litigation, the timeline for returning user deposits could extend 60 to 180 days past normal settlement.
The critical variable is arbitration. Like most prediction market platforms, Kalshi's terms of service include a mandatory arbitration clause. That clause can limit your ability to sue in court — but a gaming attorney can assess whether your state's public policy doctrine permits opt-out arguments based on fraud, regulatory noncompliance, or failure of essential purpose.
This article is for informational purposes only and does not constitute legal advice. Sports betting and prediction market regulations vary significantly by state. Consult a licensed attorney for advice specific to your situation.
Concrete Case: A $200 Bet and What Could Happen to It
Take this scenario: You place a $200 contract on Kalshi backing Guadalajara to win tonight's match against Querétaro at 1.82× implied odds — a potential payout of $364, for a net gain of $164. The match ends in a Chivas victory on a second-half goal.
If the FMF's TRO request is granted by Sunday, September 27 — within the typical 24-to-72-hour emergency window — Kalshi could be ordered to halt all Liga MX market activity before settling your contract. Your $200 would sit in a frozen position, neither paid out nor refunded, pending the court's clarification of what the injunction permits.
If settlement is delayed beyond Kalshi's standard 24-hour window, your state's consumer protection statute may give you a recourse clock. In New Jersey and Illinois — two of the largest states by Kalshi usage — licensed gaming operators must settle contracts within defined windows under state gaming commission rules. However, because Kalshi operates as a CFTC-designated futures exchange rather than a state-licensed sportsbook, those state gaming rules may not apply directly. A gaming attorney can tell you in one call whether your state's consumer fraud statutes fill that gap.
If you had instead placed the same $200 on Polymarket — Liga MX's official US partner — settlement would proceed through official Genius Sports data with no pending litigation affecting the timeline. Your $164 gain would clear in the standard window, regardless of what happens in the New York courtroom.
The dollar difference between these two outcomes is not the wager itself — it's whether you have clear legal recourse when something goes wrong. That gap is exactly where professional legal counsel earns its value.
What a Sports Law Attorney Can Help You Do Right Now
With the Apertura season running through November and Liguilla beginning in mid-October, the FMF–Kalshi case will cast uncertainty over Liga MX markets on Kalshi for at least the next six to eight weeks. Here are the specific actions a sports and gaming attorney can help you take before placing your next contract:
Review your open positions against Kalshi's user agreement. A lawyer can identify whether Kalshi's force majeure or regulatory-event clauses could be invoked to delay or deny settlement, and whether those clauses are enforceable in your state.
Determine your applicable consumer protection framework. If Kalshi is operating in your state as a CFTC exchange rather than a gaming licensee, your recovery path runs through federal channels — the CFTC's customer complaint process — not your state gaming commission. This matters for timelines and damage limits.
Preserve transaction records. Any contracts placed on Liga MX markets between July 17, 2026 (the date of the FMF's cease-and-desist letter) and the resolution of the lawsuit are potentially within the scope of the litigation. Documenting your transaction history now protects your standing if you need to join a class proceeding.
Evaluate migration. An attorney can confirm which prediction market platforms are currently authorized to operate Liga MX markets in your state — a five-minute consultation that could prevent months of frozen funds.
The Guadalajara vs. Querétaro match tonight is a single 90-minute event. The legal dispute around it could define how prediction markets cover Mexican soccer in the United States for years. If you have active contracts on the line — or plan to place them before the Apertura concludes — getting a qualified attorney's read on your specific exposure is the most efficient move you can make before kickoff.
ExpertZoom connects you with licensed sports and gaming attorneys who can answer jurisdiction-specific questions the same day.
