Ghanaian midfielder Sulley Muntari says he would walk off the pitch again, adding that Fifa and Uefa are "not taking racism seriously".
ESPN has invited the five candidates in the Fifa presidential election to participate in a live televised debate.
Suspended FIFA president Sepp Blatter has said he feared he was dying during a recent health scare.
UEFA general secretary Gianni Infantino has entered the FIFA presidential race, hours before the deadline.
UEFA boss Michel Platini has been asked by a majority of world football chiefs to stand for the FIFA presidency.
Michel Platini warned of a return to hooliganism's "dark days" as he was re-elected unopposed for a third term as president of UEFA.
FIFA vice-president, Prince Ali Bin Al Hussein will challenge incumbent Sepp Blatter for the leadership of world football's governing body.