Sepp Blatter has been president of FIFA, football's world governing body, since 1998.
Christopher Lee/Getty Images
The 79-year-old Swiss has dominated the world's most popular sport over this 17-year period, although his reign not been without controversy.
Blatter faced a criminal investigation after winning the 2002 FIFA presidential election, being accused of financial mismanagement by 11 former members of the ruling body's executive committee, including his 1998 election rival Lennart Johansson. However, prosecutors dropped the case due to a lack of evidence.
Chung Sung-Jun/Getty Images
In 2004, Blatter angered female footballers with his suggestion for how the women's game could be made more appealing. "They could, for example, have tighter shorts," said the Swiss. "Let the women play in more feminine clothes like they do in volleyball."
HECTOR MATA/AFP/Getty Images
In 2008 Blatter was ridiculed after defending the desire of Manchester United's highly-paid star Cristiano Ronaldo to join Real Madrid. He said: "I think in football there's too much modern slavery in transferring players or buying players here and there, and putting them somewhere." In 2013 he had to apologize to Ronaldo after a bizarre impersonation of the Madrid star.
Denis Doyle/Getty Images
Blatter performed a U-turn on the use of goal-line technology and apologized to the English Football Association after an incorrect decision during the 2010 World Cup. Despite replays showing a shot from England's Frank Lampard had clearly crossed the line in the last-16 clash with Germany, the goal was not awarded.
Cameron Spencer/Getty Images
In 2010, when England captain John Terry, who is married, was reported to have been involved with the partner of his former Chelsea teammate Wayne Bridge, Blatter responded: "If this had happened in, let's say, Latin countries then I think he would have been applauded."
OLLY GREENWOOD/AFP/Getty Images
In December 2010, Blatter was heavily criticized for suggesting gay football fans should "refrain from sexual activity" if they wished to attend the 2022 World Cup in Qatar, where homosexuality is illegal. Blatter later apologized and said it had not been his intention to offend or discriminate.
PHILIPPE DESMAZES/AFP/Getty Images
In December 2010 Blatter insisted that FIFA was "not corrupt ... there are no rotten eggs" despite two of his executive committee members -- Amos Adamu, pictured, and Reynald Temarii -- being suspended for accepting bribes in the lead-up to the vote for awarding hosting rights for the 2018 and 2022 World Cups. He called England "bad losers" after losing out to Russia.
A Manchester City fan displays a banner with a message for FIFA President Sepp Blatter regarding his handling of allegations of racism in football in 2011. Blatter had earlier suggested that incidents of racism on the pitch could be sorted out with a handshake when a game finished.
PAUL ELLIS/AFP/Getty Images
In January 2013, AC Milan midfielder Kevin-Prince Boateng led his team off the pitch after being subjected to racist chanting. His actions were hailed across the world. But Blatter was more cautious about the issue, refusing to support the move. "I don't think you can run away, because eventually you can run away if you lose a match," he said in an interview with a newspaper in the UAE. "This issue is a very touchy subject, but I repeat there is zero tolerance of racism in the stadium; we have to go against that." Others, like AC Milan president Silvio Berlusconi, have disagreed with him. "I am of the opposite view (to Blatter)," said Berlusconi. "I thanked and congratulated my players for their decision to leave the field."
While Blatter has overseen the first World Cups in Africa and Asia -- South Africa in 2010 and Japan and South Korea in 2002 -- he has also presided over a decline in the public's perception of FIFA. Corruption allegations surrounded the bidding process relating to the 2018 and 2022 World Cups, awarded to Russia and Qatar respectively.
TORU YAMANAKA/AFP/Getty Images
FIFA has also been heavily criticized for the employment conditions of workers building stadiums and infrastructure in Qatar for the 2022 World Cup. In early May 2015, Amnesty International released a report stating that FIFA was failing to demonstrate any sort of commitment to ensuring Qatar 2022 is "not built on a foundation of exploitation and abuse."
MARWAN NAAMANI/AFP/Getty Images
Blatter is currently seeking another term at the head of FIFA. His only challenger is FIFA Vice-President Prince Ali bin al-Hussein from Jordan (right) although Blatter is widely expected to win.