However, another set of talks between the union and Serie A bosses on Friday could be more decisive in resolving a dispute over a collective contract which guarantees players' basic rights.
"Tomorrow will only be a meeting about technicalities," Campana told Reuters.
"Tomorrow there isn't the possibility of a deal. Right now the strike is on. I can confirm we are in a discussion phase and Friday could be important but at the moment I can't say we are close."
A collective contract between the union and the league expired in the close season and players have been angered by Serie A's hard-nosed approach to negotiating a new deal.
The two main sticking points are the clubs' proposals that players who are no longer wanted should accept a transfer in the final year of their contract and that players not deemed good enough should train away from the first-team squad.
"On these two particulars, there is a position we cannot accept at all. A club can't make it an obligation that a player leaves if the contracted player does not want a transfer," added Campana, a lawyer and former player with Vicenza and Bologna.
"A contracted player also has the right to train with the first team and can't be marginalised. The league has taken note of our position but I don't know what they will decide."
The Italian game, stunned by the national team's World Cup group stage exit as holders, has only just recovered from a 2006 match-fixing scandal which severely hit the brand and experts say a prolonged strike could cause similar damage.
