FIFA has ordered Zamalek to pay former Ghana striker Junior Agogo € 1.2 million over unpaid salaries.
The Dispute Resolution Chamber of the world's football governing body announced a ruling on Agogo's legal battle with the Egyptian giants over his contract termination in 2009.
Agogo joined the White Knights in 2008 after a successful Africa Cup of Nations campaign on home soil.
He moved from English second-tier side Nottingham Forest for 750,000 pounds and was set to receive a €1.5 million during the duration of his three-year contract.
"Zamalek will take the matter to the Court of Arbitration for Sport to appeal the sanction," the Egyptian giants said in a statement on their official website.
Agogo, 34, has not played competitive football since his release from Scottish club Hibernian in 2012.