Roberto Martinez's men were a tad lucky to have kicked off their campaign with a win as they saw off Canada 1-0 in Wednesday's group opener thanks to a 44th-minute effort from Michy Batshuayi.
Morocco, who are vying for a first knockout-stage appearance since 1986, will be looking to build on their impressive opening-day performance as they held 2018 beaten finalists Croatia to a goalless draw at the Al Bayt Stadium.
Here, Sports Mole looks at how the squads of Belgium and Morocco weigh up against each other ahead of Sunday's contest.
BELGIUM
Most valuable player:
Kevin De Bruyne (£69.3m)
Overall squad value:
£487.7m
Most capped player:
Jan Vertonghen (143)
Leading goalscorer:
Romelu Lukaku (68)
Total caps:
1,372
Total goals:
248
Oldest player:
Jan Vertonghen (35)
Youngest player:
Zeno Debast (19)
Average age:
27.8
SQUAD IN FULL
Goalkeepers: Thibaut Courtois (Real Madrid), Simon Mignolet (Club Brugge), Koen Casteels (Wolfsburg)
Defenders: Jan Vertonghen (Anderlecht), Toby Alderweireld (Royal Antwerp), Leander Dendoncker (Aston Villa), Wout Faes (Leicester City), Arthur Theate (Rennes), Zeno Debast (Anderlecht), Yannick Carrasco (Atletico Madrid), Thomas Meunier (Borussia Dortmund), Timothy Castagne (Leicester City), Thorgan Hazard (Borussia Dortmund)
Midfielders: Kevin De Bruyne (Manchester City), Youri Tielemans (Leicester City), Amadou Onana (Everton), Axel Witsel (Atletico Madrid), Hans Vanaken (Club Brugge)
MOROCCO
Most valuable player:
Achraf Hakimi (£56.3m)
Overall squad value:
£209m
Most capped player:
Romain Saiss (67)
Leading goalscorer:
Hakim Ziyech (18)
Total caps:
536
Total goals:
69
Oldest player:
Munir Mohamedi (33)
Youngest player:
Bilal El Khannous (18)
Average age:
26.2
SQUAD IN FULL
Goalkeepers: Yassine Bounou (Sevilla), Munir (Al-Wehda), Ahmed Reda Tagnaouti (Wydad)
Defenders: Achraf Hakimi (Paris Saint-Germain), Noussair Mazraoui (Bayern Munich), Romain Saiss (Besiktas), Nayef Aguerd (West Ham), Achraf Dari (Brest), Jawad El Yamiq (Real Valladolid), Yahia Attiat-Allah (Wydad), Badr Benoun (Qatar SC)
Midfielders: Sofyan Amrabat (Fiorentina), Selim Amallah (Standard Liege), Abdelhamid Sabiri (Sampdoria), Azzedine Ounahi (Angers), Bilel El Khanouss (Genk), Yahya Jabrane (Wydad)
Forwards: Hakim Ziyech (Chelsea), Youssef En-Nesyri (Sevilla), Sofiane Boufal (Angers), Zakaria Aboukhlal (Toulouse), Abde Ezzalzouli (Osasuna), Anass Zaroury (Burnley), Ilias Chair (Queens Park Rangers), Abderrazak Hamdallah (Al-Ittihad), Walid Cheddira (SSC Bari)
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