(FILES) - A picture taken on March 20, 2015 in Zurich shows FIFA president Sepp Blatter giving press conference at the FIFA headquarters. Sponsors piled pressure on FIFA leader Sepp Blatter to clean up world football as two major corruption scandals overshadowed the start of a congress, on May 28, 2015, at which he will seek a new term.AFP PHOTO / MICHAEL BUHOLZER