Nigeria coach Berti Vogts has left his job in the wake of a hugely disappointing Nations Cup campaign.
It was a frustrating 12 months for the Super Eagles coach
"Too much happened during and after the African Cup. Most of all I don't have any faith in the president of the Nigerian federation anymore," Vogts said.
"Working together is no longer possible."
The 61-year-old Vogts, whose biggest triumph was leading Germany to the 1996 European Championship title, did not elaborate on his differences with Nigerian Football Association president Sanni Lulu.
"Working with the players was a lot of fun for me,"Vogts said.
"It gave me back my joy in football."
The BBC understands that Vogts is demanding payment of his contract - which was due to run until the 2010 World Cup.
The NFA has not commented officially on Vogts' departure, but a senior Nigerian sports administrator, who did not want to be named, told the BBC the NFA was disappointed that the German had broken confidentiality by speaking to the media.
The source told the BBC that a letter had been sent to Vogts on Monday detailing the NFA's disappointment with his performance both during and after the recent Nations Cup.
The former Togo coach Stephen Keshi could take over
However the source denied that the letter amounted to the termination of Vogts' contract, saying there was a 30 day notice period in any case.
His dealings with the local media were also tetchy - and his future was regularly called into question.
A host of former Nigerian stars have made it clear they are interested in the role.
Daniel Amokachi and Sunday Oliseh are amongst them, but the favourite to take over is the former Togo coach and Nigeria captain Stephen Keshi.