The Royal Belgian Football Association was not shy about its displeasure with the move.

“To date, the RBFA has still not received any grounds for this decision, nor has it received the information it has been requesting since the start of this procedure for a copy of this decision and the motivation declaring the player eligible as well as the referee’s report,” the Belgian body said in a statement. “Which is a breach of FIFA regulations.

“The RBFA has informed the United States Soccer Federation that it contests the eligibility of the player, should the player be listed on the referee’s team sheet. This leaves all further actions open.”

The Red Devils opted to take action themselves, taking a 1-0 lead during Monday’s game on a goal by Charles De Ketelaere just nine minutes into the match, putting the USMNT on its heels.

Every match of the FIFA World Cup will air on either FOX or FOX Sports 1. If you don’t have cable, you can take advantage of a DIRECTV free trial to stream it all.

Prefer to check out the action live and in person? Shop World Cup 2026 tickets on SeatGeek and make sure to use promo code NYPOST10 for $10 off purchases over $250 at checkout if you’re a first-time SeatGeek user.

Malik Tillman knotted the score with a direct kick at 31′, but it was De Ketelaere again just two minutes later to restore a lead the Belgian didn’t relinquish.

Hans Vanaken made it a 3-1 score, capitalizing on an embarrassing mistake by US goalie Matt Freese, and Lukaku put it on ice three minutes into stoppage time.

Belgium is set to square off with Spain in the quarterfinals, while the US is left to watch the rest of the tournament on home soil.