This season, Hakim Ziyech has appeared in 18 games for the Blues.
The Africa Cup of Nations will be held next month, but Hakim Ziyech has not been recalled to the squad.
He missed all six of his country's World Cup qualification this year, and has not played for the Atlas Lions since July.
Wolves centre-back Romain Saiss is included by Vahid Halilhodozic.
The defender is from Paris St-Germain.
The tournament in Cameroon will start on January 9 and last until February 6.
The Africa Cup of Nations squad is complete.
Reports of a falling out between the former club-mates of Halilhodzic has led to the omission of Noussair Mazraoui.
It will be a boost for the Blues if they can get the services of Ziyech in the new year, as they face either Spurs or Chesterfield in the League Cup semi-finals.
The club is going to play in the Club World Cup in February.
The squad for the Africa Cup of Nations was named on Thursday.
The side, ranked 132 in the world, only lost one game in qualification.
They include a player from Red Star Belgrade and a veteran defender from Millwall.
The Indian Ocean islanders have no players in the squad that is based in the Comoros.
The squad for the tournament in 2021.
The goalkeepers are: Monir El Kajoui, Anas Zniti, and Yassine Bounou.
Defending: Souffian El Karouani, Adam Masina, and Sofian Chakla.
Midfielders are Aymen Barkok, Sofyan Amrabat, and Ilias Chair.
The forwards are: Munir El Haddadi (Sevilla, Spain), Zakaria Aboukhlal (AZ Alkmaar, Netherlands), Abdessamad Ezzalzouli ( Barcelona, Spain), and Ryan Mmaee (Ferencvaros, Hungary).
There is a squad for the 2021, Afcon.
Goalkeepers are: Ali Ahamada, Moyadh Ousseni, and Salim Ben Boina.
Defending: Younn Zahary (SO Cholet), Bendjaloud Youssouf (chateauroux, France), Abdallah Ali Mohamed (Stade Lausanne, Switzerland) and Kassim Mdahoma (US Avranches, France).
Midfielders are: Youssouf M'Changama, Nakibou Aboubakari, and Iyad Mohamed.
The forwards are: Faiz Selemani (KV Kortrijk, Belgium), Mohamed El Fardou (Red Star Belgrade, Serbia), Nasser Chamed (Gaz Metan Medias, Romania), and Ali M.
