The trader wrongly wagered on Polymarket what bookmakers saw as an almost certain Spanish win against the tiny island underdogs at their tournament opener.

The small nation of Cape Verde managed a draw against Spain, a World Cup favorite.

One trader lost $1 million betting Spain would win. Another bought "No" at 9¢ and walked away with $4.3 million.

A Polymarket trader lost roughly $1M betting on Spain to beat Cabo Verde in a World Cup match that ended 0-0, while a counter-bet turned $400K into $4.7M.

The trader wrongly wagered on Polymarket what bookmakers saw as an almost certain Spanish win against the tiny island underdogs at their tournament opener.