The Jordanian prince is Platini's main rival in a February election to replace Sepp Blatter, who became a formal subject of a criminal investigation into football corruption on Friday. Blatter was questioned over a 2011 "disloyal payment" of 2 million Swiss francs (about $2 million) to Platini that was supposedly for work carried out at least nine years earlier.
Platini, who was questioned as a witness, denies wrongdoing. However, if he is implicated in the probe surrounding Blatter it could benefit Prince Ali's chances of winning the Feb. 26 poll.
A rift has grown between Platini and Prince Ali since the UEFA president backed the Jordanian federation chief's failed bid to unseat Blatter in May.
Blatter was re-elected for a fifth term despite close allies being indicted days earlier as part of a U.S. investigation into bribery and fraud in football. Four days later, the 79-year-old president hastily announced plans to quit.