A group of Fulham players approached the club's owners to voice their concerns over Claudio Ranieri after they were left baffled by his training methods.
The Italian was sacked by the Cottagers last month following a dismal run of just three wins in 17 games which left them rooted in the drop zone.
Senior players were left bemused by Ranieri's desire to play a hour of handball on the day before crucial games rather than work on tactical drills and set-pieces as his side battled against relegation.
A source told The Sun: 'When things are going wrong you expect the manager to try and come up with some answers to get them out of the mess they were in.
'But all they got the day before crucial games when every point counted was a game of handball.
'It got to a point where some of the players had simply had enough and told the owners they have to make a change or they are certain to go down.'
Scott Parker has ben put in temporary charge by owner Shah Khan in a bid to keep them in the top flight.
Fulham have lost their last six games and are 13 points from safety. They face title-chasing Liverpool on Sunday.