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.
Aberdeen have announced that goalkeeper Jamie Langfield has signed a new two-year contract.
The 32-year-old returned to first-team action this month after suffering a brain seizure last summer.
The former Dundee player joined Aberdeen in 2005 and has made 226 appearances for the club.