The 79-year-old, accused of corruption, was told to take time off with stress last week and has now been taken to a Swiss hospital
Who is in the running to take over the reins at football's scandal-hit governing body?
Self-congratulatory Fifa propaganda film damned by critics and shunned by audiences
Divisive calls for Qatar to lose tournament should be put to one side until dust settles on Fifa crisis
News of Blatter's unexpected departure could raise as many questions as it answers for Fifa
A round-up of responses to the Fifa President's decision to quit
Fifa may be in disarray, but Blatter still had enough support to win the presidential election... why?
From gay sports fans to racism in football, no subject has ever been out of bounds for Sepp Blatter
The FBI and Swiss probes explained, and what it means for the embattled Sepp Blatter
Portuguese legend quits race against Blatter as he slams 'devils who are compared to Jesus'
Fifa president Sepp Blatter is an implacable obstacle, but if he is replaced England may bid for 2026 tournament
Tournament will clash with Champions League group stage and may be trimmed to 28 days
Football's governing body lost five backers last year as campaigners call for change at the top
French winger announces intention to dethrone Blatter, but support of Paddy Power raises questions
Garcia's resignation would shred the credibility of any organisation other than 'wretched' Fifa
The man tasked with cleaning up Fifa walks away from football and its lack of principles
Fifa shrugs off Garcia complaint, but pressure to publish his findings won't go away
Uefa urged to take the ultimate step and walk away from scandal-hit governing body
Media rages at Fifa as Garcia washes hands of corruption report and FBI steps up investigation