A verdict is expected some weeks later.

The 65-year-old South Korean official was exiled from the game for a six-year period in October 2015 after he was found guilty of infringing FIFA ethics rules related to conduct, confidentiality, disclosure and collaboration.

It followed reports into the bid processes for the 2018 and 2022 World Cups - the second of which was being targeted by South Korea, the joint World Cup hosts with Japan in 2002.

The FIFA Appeals Committee did reduce his ban by one year in July 2016 but Chung wants it quashed completely.

Chung, a member of the family which owns World Cup sponsor Hyundai, planned to run in the FIFA Presidential election to succeed Sepp Blatter when the FIFA Ethics Committee announced in 2015 it was investigating him.

Shortly before he lodged his appeal to CAS in April the multi-billionaire, who has been a regular critic of football’s world governing body since his ban, accused the Ethics Committee of "malicious behaviour" in taking so long to prosecute his case.

He claimed world football's governing body is still littered with officials loyal to the disgraced Blatter, who has now been replaced by Gianni Infantino.

He has also insisted his appeal to the CAS will be successful and has vowed to "clean up" the organisation should sport's supreme court rule in his favour.

Chung claims he has a strong case and has refused to give up the fight to clear his name.

He has also called on Infantino to take an interest in his appeal.

The World Cups in 2018 and 2022 were awarded to Russia and Qatar respectively.