Criticised for his playacting, Neymar went down lightly under minimal contact from Marouane Fellaini at the start of the second half when Brazil trailed 2-0.
Brazil and Belgium go head-to-head on Friday evening with a place in the World Cup semi-finals up for grabs.
Argentina lost its Round of 16 clash with France at the ground, which is the home stadium for Russian Premier League side, Rubin Kazan. Belgium won the first back in a 1963 friendly, while Brazil have won the following three meetings.
Trailing for the first time in the World Cup, a focused Seleção came out in the second looking determined to get on the scoreboard.
Either England or Sweden will face either Russian Federation or Croatia in the other semifinal match on Wednesday in Moscow - a day after Belgium plays France in St. Petersburg.
Lukaku is pleased with his contribution to Belgium's World Cup cause so far, with a prolific marksman eager to point out that he wants to offer more than just end product. Thrilling to watch as the teams traded blows on either end, it also became clear early on that Tite's back line would have few answers for Belgium's front three of De Bruyne, Eden Hazard and Romelu Lukaku, who launched wave after wave of counterattack.
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"The games aren't for coaches, they're for players, you have to help the players be themselves on the pitch". Brazil, meanwhile, burst into the box several more times and might have at least pulled level if not for some wasteful finishing. "They have a lot of top players and finished well".
There has been so much debate about Neymar simulating fouls or wasting time on the floor, but I think that in a competition like this - with VAR - we shouldn't be paying too much attention to this. Manchester City star Fernandinho is likely to replace him.
The Brazilians were made to pay for their profligacy in the 13th minute, as Fernandinho diverted a Nacer Chadli corner into his own net.
Though Belgium and Brazil are evenly matched in terms of quality, coach Roberto Martinez said there's a simple difference between the two teams.
Brazil dominated possession and carved out chance after chance but could not score until substitute Renato Augusto headed home Philippe Coutinho's cross 14 minutes from time.
After all was said and done, it was De Bruyne who was head and shoulders above all the others and is now emerging as a world-class talent whether playing for club or country.