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.
Ipswich skipper Carlos Edwards will remain at the club until the end of the 2013/14 campaign after triggering a clause in his contract.
The 34-year-old signed a one-year deal last season with an option of a further 12 months if he made a set number of appearances.
The Trinidad international arrived at Portman Road in 2009 after being signed by Roy Keane and was handed the captaincy by Paul Jewell last season.
He has made 31 appearances for Mick McCarthy's side this season.