Lazio have terminated their €19 million shirt sponsorship with Polymarket by mutual consent. The Serie A club ended the deal after Italian regulators ruled the prediction market platform ineligible. The sponsorship was announced earlier in 2026 and had been among Polymarket's most prominent European sports partnerships. Neither source specifies which authority issued the ruling or its grounds. The deal was already under pressure after the Italian regulator ADM suspended Polymarket's operations days earlier.

Polymarket loses its flagship European sports partnership entirely, not just suspended. Lazio now hunts replacement revenue mid-season with fixtures underway. Other football clubs and leagues will treat this collapse as a warning; the sponsorship channel that prediction markets have explored globally just narrowed. Each European blacklist shrinks the retail market where Polymarket can operate without geofencing or local licenses. The episode also exposes the limits of CFTC designation as a shield abroad; national regulators apply gambling law regardless of US status. The next club that tests a prediction-market deal will demand stronger regulatory clarity upfront.