Zlatko Dalic's men made it to the final of football's biggest tournament four years ago and will be hopeful of another deep run into the latter stages of the competition.
Morocco, meanwhile, will be aiming to go one better this time around having suffered early exits in each of their last three appearances at this level.
Here, Sports Mole looks at how the squads of Morocco and Croatia stack up against each other ahead of the contest.
MOROCCO
Most valuable player:
Achraf Hakimi (£56.3m)
Overall squad value:
£209m
Most capped player:
Romain Saiss (66)
Leading goalscorer:
Hakim Ziyech (18)
Total caps:
521
Total goals:
69
Oldest player:
Munir Mohamedi (33)
Youngest player:
Bilal El Khannous (18)
Average age:
26.1
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)
CROATIA
Most valuable player:
Josko Gvardiol (£52m)
Overall squad value:
£326.8m
Most capped player:
Luka Modric (155)
Leading goalscorer:
Ivan Perisic (18)
Total caps:
979
Total goals:
125
Oldest player:
Luka Modric (37)
Youngest player:
Luka Sucic (20)
Average age:
26.1
SQUAD IN FULL
Goalkeepers: Dominik Livakovic (Dinamo Zagreb), Ivo Grbic (Atletico Madrid), Ivica Ivusic (Osijek)
Defenders: Josip Stanisic (Bayern Munich), Borna Sosa (Stuttgart), Josko Gvardiol (RB Leipzig), Dejan Lovren (Zenit St Petersburg), Borna Barisic (Rangers), Domagoj Vida (AEK Athens), Josip Juranovic (Celtic), Martin Erlic (Sassuolo), Josip Sutalo (Dinamo Zagreb)
Midfielders: Luka Modric (Real Madrid), Mateo Kovacic (Chelsea), Marcelo Brozovic (Inter Milan), Mario Pasalic (Atalanta BC), Nikola Vlasic (Torino), Kristijan Jakic (Eintracht Frankfurt), Lovro Majer (Rennes), Luka Sucic (Red Bull Salzburg)
Forwards: Ivan Perisic (Tottenham Hotspur), Andrej Kramaric (Hoffenheim), Marko Livaja (Hajduk Split), Bruno Petkovic (Dinamo Zagreb), Mislav Orsic (Dinamo Zagreb), Ante Budimir (Osasuna)
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