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.
Napoli right-back Camilo Zuniga has signed a four-year contract extension ahead of Tuesday's Champions League game against Arsenal at the Emirates Stadium.
The Colombia international, whose previous deal expired next summer, will earn a reported 3.5million euros per season.
"I have always believed in Camilo and he has always believed in Napoli," club president Aurelio De Laurentiis said on the club's official website, sscnapoli.it. "The wages are those that he deserves.
"In the past few years he has worked with humility and in silence and he deserved a recognition."
The 27-year-old joined Napoli from Siena in 2009 and has since made 148 appearances for the Naples outfit.
"I want to thank the president for the trust placed in me and I thank the fans for their affection," Zuniga said.
"I am happy at Napoli and I want to end my career in the Azzurro colours."