Relegation-threatened Livorno have sacked Domenico Di Carlo after just 88 days in charge and re-appointed Davide Nicola.
Virgil van Dijk claims he knows nothing of interest from English clubs and is keen to prove himself in the Champions League with Celtic.
The Ivorian-born Danish centre-back has been linked with a number of Premier League clubs including Chelsea, Liverpool, Manchester United and more recently Fulham.
With Brede Hangeland out of contract in the summer and Aaron Hughes now 33, Cottagers boss Martin Jol is looking freshen up his central-defensive partnership.
But Okore, 20, will now not be leaving his homeland on transfer deadline day, according to his agent Nicola Juric.
He told the website sporten.dk: "Nothing will happen for Jores. There has been a lot of talk and there were some offers but nothing that was interesting enough.
"But that is okay. We are not in a hurry. As we have told all interested clubs, it has to be the right move for him if he is to leave Nordsjaelland."