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.
Jose Angel will spend a second season on-loan at Real Sociedad after the Basque outfit agreed a deal with parent club Roma.
The left-back spent last term with La Real, making 11 appearances, and will now remain in northern Spain.
The 23-year-old moved to Serie A from Sporting Gijon in 2011 but has found first-team opportunities hard to come by in the Italian capital.