Prince Ali bin al-Hussein of Jordan has confirmed that he will stand in next year's FIFA presidential election.
The 39-year-old stood against current president Sepp Blatter in a poll in May, and pushed voting into a second round before stepping aside.
He has now announced that he will once again run for the position, with Blatter resigning amidst a corruption scandal that has seen two criminal investigations against FIFA begin.
Ali said: "Ten months ago, I was the only person who dared to challenge Mr. Blatter for the presidency of FIFA. I ran because I believe that FIFA needs change. And I had the courage to fight for change when others were afraid.
"I conceded that election. Not because I was not the best candidate but because others were using me to make room for themselves. They didn't have the guts to run, but I did. Ever since President Blatter promised his resignation just a few days later, they have been scrambling to secure the job for themselves.
"I didn't stand for election the first time to make way for others. This election should be about football and not personal ambition. I will not be a pawn for others. I cannot leave the field that I have cleared only to allow a flawed system to continue."
He added: "Since the last election, I have thought long and hard about how to reform FIFA. It will be a difficult task. We must overcome deep-seated corruption and political deal-making.
"But I was not brought up to walk away in the face of a tough fight. Nor have I been brought up to walk away from what I believe in or take the easy way out.
"This is about right and wrong. It's time for us to stand up for what we believe in.''
Ali joins UEFA president Michel Platini as the only confirmed candidates, with former FIFA executive Chung Mong-joon of South Korea and Liberian FA president Musa Bility having indicated that they intend to run, but they have not yet made their candidacy official.