The news Arsenal were hoping for has been confirmed, Marek Hamsik will miss the fixture tomorrow night.
Hamsik - rated at £35 million - has scored six times in nine Serie A starts for Rafa Benitez' side this season and is crucial to them, but has missed the past two games with a toe injury.
Napoli have confirmed their squad for the match at the San Paolo, with Hamsik not involved - although dangerman Gonzalo Higuain does feature.
The squad is as follows:
Reina, Rafael, Colombo; Albiol, Armero, Britos, Cannavaro, Fernandez, Uvini; Behrami, Dzemaili, Maggio, Inler, Radosevic, Callejon; Duvan,Higuain, Insigne, Mertens, Pandev.
Former Premier League faces include Liverpool loanee Pepe Reina and ex-West Ham midfielder Valon Behrami.
Defender Bruno Uvini was at one point close to signing for Tottenham Hotspur until the club backed out of the deal, although he is not expected to start tomorrow.
Captain Paolo Cannavaro is named despite his agent publicly criticising Rafa Benitez last night, with the defender left on the bench in recent games.