An Egyptian court has added former football star Mohamed Aboutrika to the authorities' terror list, his lawyer said Tuesday, based on suspicions he financed the banned Muslim Brotherhood.

In 2015 a government committee froze the assets of the former player for Cairo-based club Al-Ahly and Egypt's national team, two years after he retired.

The government accuses him of financing the Muslim Brotherhood, which was classified as a terrorist organisation at the end of 2013.

According to an anti-terror law imposed in 2015 by President Abdel Fattah al-Sisi, anyone on the country's terror list is subject to a travel ban, with their passport and assets liable to be frozen.

One of the most successful African footballers of his generation

Aboutrika, one of the most successful African footballers of his generation, had publicly endorsed the presidential bid of the Muslim Brotherhood's Mohamed Morsi in 2012.

Full screen Mohamed Aboutrika

Morsi went on to become Egypt's first democratically elected president, only for the army to oust him one year later and ban the Brotherhood.

Aboutrika's lawyer Mohamed Osman said that the court's decision was "contrary to the law" saying the retired player "has not been convicted or formally notified of any of the charges against him."

Appeal lodged

"We will appeal this decision," he said, adding that "if he is added to the list there will be many legal consequences, notably the travel ban."

The freeze on Aboutrika assets is still in force, despite two court orders that it be lifted, Osman added.

In an interview with state-run Al-Ahram newspaper in May 2015, Aboutrika denied that his company -- or any of his partners -- had ever funded the Islamist movement.

Since Morsi's overthrow, a police crackdown against the Brotherhood has left hundreds dead and thousands jailed.

Aboutrika retired in 2013, and the 37-year-old has since avoided expressing his political views publicly.