A Polymarket account that earned about $1 million on Dortmund’s Champions League win saw that profit erased by $1.13 million in losses on Sunday’s Manchester United and Barcelona matches.
According to Bitcoin.com News, a Polymarket trader identified as totoro3miyazaki erased a seven‑figure gain from earlier in the week by losing roughly $1.13 million on two soccer matches on Sunday, Nov. 8. The account had made about $1 million betting on Borussia Dortmund’s 2‑1 Champions League victory over Real Betis on Nov. 4, but subsequent wagers on Manchester United’s 4‑4 draw with Aston Villa and on Barcelona’s 2‑1 win at Atlético Madrid turned that profit into a net loss.
Polymarket data shows the trader purchased 1,633,345 shares in Manchester United at roughly $0.48 each, spending $818,300 including fees, just before kickoff. United entered the match as 48.5% favorites, but fell behind 4‑2 before scoring twice in stoppage time to finish 4‑4. The price of United shares fell below $0.01 late in the game, and the final draw left the account with an $818,286 loss.
In the same evening, the account bought 591,602 “No” shares on a Barcelona win for about $297,800, with most of the purchase made at $0.49 per share before the 20:00 UTC kickoff. Barcelona, listed at a 50.5% chance to win, ultimately defeated Atlético Madrid 2‑1, causing a $297,792 loss for the trader.
The losses bring totoro3miyazaki’s cumulative result to a net deficit of roughly $338,000 on nearly $34 million of lifetime trading volume, according to Polymarket’s leaderboard. The account’s activity mirrors a trend of large‑scale single‑game bets on the platform, including a $500,000 NFL matchup in October. This surge in high‑value sports wagering is drawing legal interest; the American Gaming Association referenced Polymarket’s model in an amicus brief filed on Nov. 6 supporting Kalshi’s appeal in the Second Circuit, arguing the exchange offers “garden‑variety sports bets.”
Observers will monitor whether Polymarket adjusts its risk controls or fee structures in response to the growing size of sports bets, and how ongoing litigation involving rival platform Kalshi may influence regulatory treatment of crypto‑based prediction markets.
Discussion 0