Asian football chief Mohamed Bin Hammam will announce on Friday whether he will challenge Sepp Blatter for the FIFA presidency.
The 61-year-old Qatari has been hinting for the last two months that he may stand and will hold a news conference at the headquarters of the Asian Football Confederation in Kuala Lumpur on Friday.
Bin Hammam said on his Twitter account: "I will hold a press conference on Friday, March 18, at AFC House. I will clarify my position regarding the FIFA presidency elections, which take place in June 2011."
The pair fell out two years ago and Bin Hammam's stunning success in securing the 2022 World Cup for Qatar has stimulated him to consider a challenge.
The FIFA presidential election is due to take place in Zurich on June 1.