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.
David Miliband's decision to quit Sunderland due to Paolo Di Canio's appointment has been labelled "a sad knee-jerk response" by the man who gave the Italian his first chance in management.
Former foreign secretary Miliband immediately resigned as Sunderland's vice-chairman and non-executive director after Di Canio was named Martin O'Neill's successor on Sunday, citing the Italian's "past political statements".
Di Canio has admitted to having fascist leanings, telling Italian news agency ANSA in 2005: "I am a fascist, not a racist."
Former Swindon chairman Jeremy Wray, who appointed the 44-year-old as Town boss in May 2011, does not think the outspoken views will conflict with Di Canio's attempts to keep Sunderland in the Barclays Premier League.
He told BBC Radio 5live: "It is a sad knee-jerk response. I doubt David Miliband has ever met Paolo Di Canio. I've known him for two years. I don't think politics was ever discussed once.
"Paolo will have many strong views. He probably has a strong view on whether Italy should be in the Euro, gay marriage or the endangered Siberian tiger, but I doubt if it's really relevant to keeping Sunderland in the Premiership.
"I think anybody's political views and their private views - as long they're private and how they conduct themselves away from their job - are pretty irrelevant.
"Nothing of that was ever discussed during his time at Swindon. He was focused full-on 24 hours on success for us and that's what he'll do for Sunderland."
Sunderland dismissed O'Neill on Saturday evening following the club's 1-0 home defeat against league leaders Manchester United.
That result left the Black Cats without a win in eight games and just a point clear of the relegation zone.
With seven games remaining, Di Canio faces a fight to keep Sunderland in the top flight but Wray believes the former West Ham, Lazio and Celtic striker will be a roaring success on Wearside.
"He will galvanise the team," said Wray. "He is passionate; he eats, sleeps and drinks it. He is full-on 24 hours a day and will be focused on the last seven games of the season.
"The Sunderland fans who are nervous now and are doubting the appointment should have no fears and trust what I saw in him is what (Sunderland chairman) Ellis Short will have seen in him as someone who is committed to the job."
Wray added: "There was no doubt that when he was at Swindon he was cutting his teeth in management, but I can assure you I think he's ready for the step up.
"He's learnt a lot, he's very intelligent, he's a quick learner and he's his own biggest critic.
"He'll have seen where he's gone wrong in the past and I think it's a really astute appointment."