FIFA presidential candidate Prince Ali is asking for Friday's election to be suspended in a dispute over voting procedures.
The Jordanian prince's lawyers said Tuesday they are seeking "provisional measures" from the Court of Arbitration for Sport to postpone the vote to select Sepp Blatter's successor.
The lawyers said in a statement that FIFA turned down Prince Ali's request for the use of transparent voting booths, a move they said will deny "any right to a fair and transparent voting process."
Ali is one of five candidates in the race, along with Sheikh Salman of Bahrain, UEFA general secretary Gianni Infantino, South Africa's Tokyo Sexwale and former FIFA executive Jerome Champagne of France.