The match was tightly contested. Fabián Ruiz opened the scoring for Spain, before Charles De Ketelaere equalized for Belgium.
The match remained a tight, dramatic affair until Mikel Merino capitalized on a rebound in the 88th minute following a shot by Pau Cubarsi.
The late goal broke a resilient defensive effort by Belgium, ultimately extending Spain's unbeaten streak to 36 matches.
The win extends Spain's impressive run at the World Cup and earns them a spot in the semi-finals, where they will face France in Arlington, Texas, next Wednesday.
