The Belgians were first on the ascendancy after Romelu Lukaku latched onto a long ball to draw a save from Farouk Ben Mustapha in the opening minutes. A loss for Panama or England will seal their spot in the last 16.
Belgium against Tunisia was full of stats.
Michy Batshuayi closed in on his first World Cup goal, but his attempt was cleared off the line after rounding Mustapha 14 minutes to full-time.
After also scoring twice in the opening 3-0 win against Panama, Manchester United's Lukaku showed clinical finishing with two first-half goals in Moscow, matching Ronaldo's tally in Russian Federation.
Eden Hazard celebrates after scoring Belgium's fourth goal against Tunisia.
Tunisia responded two minutes later, Bronn leaping highest to head home a free-kick from his skipper Khazri on 18 minutes, only to be later carried off after landing awkwardly following a collision.
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Monday at 7pm could be a very interesting time. "Two years ago we started a new journey, we were ranked 81st". Asked if he was heading for Daei's record after the match, he said: "I don't care about the records".
Group G of the 2018 FIFA World Cup is really will take shape when Belgium and Tunisa meet.
In bringing in Khaoui, who plays in France for Troyes, Maaloul is going for a right-sided attacking midfielder in his 4-3-3 formation, pushing Anice Badri further forward in place of Sliti on the left. In that case Tunisia would be eliminated on zero points.
England will await the result of this match with a great deal of interest with their Group G encounter with Panama on Sunday.
Roberto Martinez revealed that Romelu Lukaku is an injury doubt for Belgium's World Cup blockbuster tie against England after the in-form striker picked up an ankle injury on Saturday.
Belgium, ranked third in the world, reached the quarter-finals of Brazil 2014 and are aiming to match their previous best of reaching the semi-finals at Mexico 1986.
Since then most editions of the tournament have averaged between 2 and 3 goals per game.