The 63-year-old billionaire South Korean has been subjected to attacks in the German press, who have not cited their source, since he launched his campaign to replace Blatter last week.
The 79-year-old Swiss stepped down shortly after winning a fifth term earlier this year with FIFA embroiled in allegations of corruption, 14 FIFA and sports business executives were charged by US authorities in May over more than USD 150 million in bribes allegedly paid for television and marketing deals.
Chung, a former FIFA vice-president, had on Saturday refuted the allegations against him in that he tried in 2010 to influence the vote in his home country's favour for the hosting of the 2022 World Cup in violation of the body's code of ethics -- Qatar were controversial winners and their victory along with Russia's for 2018 is subject to one of the investigations.
However, on Tuesday Chung issued another statement in which he slammed the manner in which the campaign was being constantly affected by leaks springing from within FIFA and he said if the election was not seen to be fair then FIFA's image would not recover.
"Only a fair and open election can resuscitate FIFA's reputation which has been gravely undermined by scandals old and new.