Belgium Squad
Goalkeepers: Thibaut Courtois, Senne Lammens, Mike Penders
Defenders: Zeno Debast, Arthur Theate, Brandon Mechele, Maxim De Cuyper, Thomas Meunier, Koni De Winter, Joaquin Seys, Timothy Castagne, Nathan Ngoy
Midfielders: Axel Witsel, Kevin De Bruyne, Youri Tielemans, Diego Moreira, Hans Vanaken, Nicolas Raskin, Amadou Onana
Forwards: Romelu Lukaku, Leandro Trossard, Jeremy Doku, Dodi Lukebakio, Charles De Ketelaere, Alexis Saelemaekers, Matias Fernandez-Pardo
Head coach Garcia could bring Romelu Lukaku back into the starting XI after the experienced forward made an immediate impact in the draw against Egypt.
Kevin De Bruyne and Leandro Trossard are expected to provide the creative support behind Belgium's all-time leading scorer.
Man City winger Jeremy Doku will not feature due to a viral infection.
"We should have been better as a team in the first half," Garcia said. "I'm happy for Romelu. When you're an opponent, and you see Lukaku coming onto the pitch, you're probably quaking in your boots, and your level of concern is on the rise."
Looking ahead to Sunday's clash with Iran, Garcia stressed the importance of securing all three points as Belgium chase a place in the knockout rounds for the first time since 2018.
"We have to win against Iran. There are no two ways about it."
Iran Squad
Goalkeepers: Alireza Beiranvand, Payam Niazmand, Hossein Hosseini
Defenders: Saleh Hardani, Ehsan Hajsafi, Shojae Khalilzadeh, Milad Mohammadi, Hossein Kanaanizadegan, Aria Yousefi, Ali Nemati, Ramin Rezaeian, Danial Eiri
Midfielders: Saeid Ezatolahi, Alireza Jahanbakhsh, Mohammad Mohebi, Saman Ghoddos, Rouzbeh Cheshmi, Mahdi Torabi, Mohammad Ghorbani, Amirmohammad Razzaghinia
Forwards: Mehdi Taremi, Mehdi Ghayedi, Ali Alipour, Amirhossein Hosseinzadeh, Shahriyar Moghanlou, Dennis Eckert
Iran boss Ghalenoei is expected to keep faith with much of the side that earned a draw against New Zealand.
The Asian qualifiers have a couple of injury concerns ahead of Sunday's Group G clash. Roozbeh Cheshmi remains doubtful, while Saman Ghoddos faces a late fitness test.