Celtic claim a fee was agreed with Manchester City for John Guidetti prior to them taking the striker on loan.
Xabi Alonso claims no Premier League offers were put to him before leaving Real Madrid for Bayern Munich.
Brighton have threatened to take action against the League Managers' Association as the dispute with Gus Poyet rumbles on.
The LMA leapt to the defence of suspended Seagulls boss Poyet on Monday after he failed to attend a discplinary hearing at the club.
Poyet, assistant manager Mauricio Taricco and coach Charlie Oatway were told to stay away from the club last month in the aftermath of the npower Championship play-off semi-final defeat by Crystal Palace.
Brighton have remained tight-lipped over the reasons for taking the action, although Taricco has since had his suspension lifted.
The LMA yesterday backed Poyet's decision to miss the hearing, which will now take place on Thursday, and said the charges against him were, in its opinion, "unfounded".
Now Brighton have released a statement condemning the LMA's comments.
It read: "Brighton & Hove Albion Football Club was disappointed and concerned to see comments made by the League Managers' Association in advance of the reconvened disciplinary hearing involving Gus Poyet.
"The LMA's statement was neither fair nor accurate.
"The club will not comment further at this stage because it is important that the disciplinary hearing takes place according to the relevant timescales and procedures.
"Meantime, the LMA is fully aware that the club has reserved its right to consider further action regarding the LMA's statement once the disciplinary process is complete."