The contest opened amid the familiar spectacle now routine at United States World Cup fixtures, complete with an energetic patriotic crowd, pyrotechnics, colored smoke and a military aircraft display overhead.

Yet the American ambition of claiming a first title ended in disarray during the early hours of Tuesday following a dismal loss to Belgium.

The United States fell 4-1, marking their largest margin of defeat since 1990, as the vibrant mood that marked earlier matches evaporated well before the end, with Belgium fourth goal triggering an exodus of supporters from Seattle Stadium.

This last-16 exit for the co-hosts concluded a turbulent period dominated by Fifa decision to lift Folarin Balogun red card suspension from the prior fixture, permitting him to feature here.

Their progress had seemed to galvanize national interest, yet that momentum appeared diminished by the Balogun episode, a point noted by the Belgian players ahead of kickoff.

Full-back Timothy Castagne remarked before the match that it was advantageous to have global support against the United States.

Balogun indicated he was unsurprised the ruling proved divisive.

He stated he accepted the initial red card and likewise accepted the subsequent clearance to participate, adding there was little more to discuss.

The extent to which this episode affected the United States and the reasons behind Mauricio Pochettino side shortcomings remain key questions.

Beyond the scoreline, the United States displayed a noticeable shift in approach.

Having moved past an underdog mindset under Pochettino, they exhibited bold confidence throughout the tournament, pressing opponents effectively and inspiring belief among supporters that an upset remained possible.

One fan forecast victory in the World Cup before kickoff, reflecting widespread optimism among those gathered outside Seattle Stadium.

Supporters also welcomed the clearance for in-form striker Balogun despite his straight red card for a challenge on Bosnia-Herzegovina defender Tarik Muharemovic in the previous round.

Fifa decision to waive the automatic ban for 12 months drew criticism from Uefa, Belgium and England manager Thomas Tuchel.

The matter reached political levels when President Donald Trump stated on Monday he had urged Fifa to reconsider, believing no foul occurred.

Balogun, with three tournament goals, started against Belgium yet made limited impression.

Pochettino later insisted the surrounding attention did not hinder the team performance and offered no excuses, noting it simply was not their day.

He questioned the value of insults and negative messages, emphasizing his focus remained on preparing the squad and that player availability via Fifa ruling posed no issue.

The manager voiced personal disappointment that politics and manipulation overshadowed ethics and integrity in the sport.

Belgium coach Rudi Garcia noted Balogun spoke with him after the match, stressing the player bore no blame.

Attacking play was not the primary concern for the United States against Belgium, as defensive lapses largely explained the heavy defeat.

Charles De Ketelaere was unmarked in the area to open the scoring and later outmuscled two defenders to head Belgium second goal shortly after the United States equalized.

The third goal proved especially damaging when De Ketelaere dispossessed hesitant goalkeeper Matt Freese outside the area, allowing Hans Vanaken to finish from distance.

This gave Belgium a 3-1 advantage and drained momentum from United States supporters, many of whom departed in the closing stages before Romelu Lukaku stoppage-time goal prompted further exits.

One supporter lamented the lack of commitment to challenges and overall drive.

Another highlighted unforced errors throughout the United States display while crediting Belgium for executing their game plan and quieting the crowd.

Pochettino acknowledged his team never engaged fully from the outset and conceded immediately after equalizing.

Despite a subdued buildup, Americans embraced the tournament once underway, filling fan zones and bars nationwide with national team shirts visible everywhere.

The run to the knockout phase and attacking style boosted engagement, yet questions linger after fellow co-hosts Canada and Mexico also exited at the last-16 stage.

Midfielder Tyler Adams stressed the result did not define their overall progress, noting good and bad days while highlighting inspiration for young players.

Supporters speaking after the match suggested the tournament would ultimately be seen positively once the disappointment fades, though further development is needed for the nation to rank among established football powers.

One fan praised the event organization and expressed optimism for soccer growth domestically.

Another noted the need to build deeper football culture over time.

Pochettino own future also remains unclear, with his contract ending after the World Cup and no immediate indications given post-match.

He indicated a period of rest and reflection would precede discussions with the federation.