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.
Striker Lewis Guy has secured his release from St Mirren.
Cumbria-born Guy had been told he was free to find a new club and had been training with Carlisle before reaching agreement with Saints to end his contract a year before it was due to expire.
A club statement read: "It has been confirmed this morning that Lewis Guy has cancelled his contract with St Mirren Football Club by mutual consent."
The 27-year-old joined St Mirren a year ago from MK Dons and hit six goals in 35 appearances.
His final appearance, in a goalless draw with Aberdeen in the penultimate match of the season, saw him substituted 16 minutes after coming on, following an exchange of words with assistant manager Tommy Craig.