Fiorentina's future in Europe is in the hands of UEFA after Tuesday night's cup tie against Swiss club Grasshopper was suspended when a powerful firework injured a match official.
The blast, which came as the players walked off at the end of the first half, injured Belgian fourth official Philippe Flament and stunned Fiorentina striker Luis Oliveira.
Fiorentina had hoped UEFA would allow the second round, second leg tie to be re-played in Salerno yesterday.
Instead, UEFA announced from Switzerland that they will make a decision before next Monday over whether to replay the game. The other option will be to award Grasshopper the customary 3-0 victory, putting the Swiss in the third round.
Flament left his hotel on crutches yesterday after needing seven stitches to a leg wound suffered in the explosion. After a check-up at Salerno hospital, he said: "I feel fairly alright, there shouldn't be any problems."
Fiorentina's managing director, Santiago Luna, remains hopeful of another chance to finish the tie, which the Italians were leading 2-1 on the night and 4-1 on aggregate.
"We are confident that the UEFA commission will make a positive decision when it meets," he said. "Our fans were in the opposite stand to the one where the device was thrown from.
"It was a premeditated act of terrorism against sport.
"I am very sorry about it, because it ruined a moment of celebration and of solidarity, because the gate receipts were going to the flood victims of the Sarno region."
The mayor of Salerno, Vincenzo De Luca, condemned the attack as "untolerable and extremely serious" and offered his apologies.
"The least I can do obviously is to apologise to the citizens and the football fans of Florence, to Fiorentina and above all to the fourth match official, Philippe Flament.
"Episodes like this one should never happen. The police were at the stadium to guarantee people's safety - I ask myself, `How is it possible that such a device could be brought into the ground?'.
"Obviously, security measures will have to be reviewed."
The Italian national team are due to play a friendly against Spain in Salerno in a fortnight.
De Luca said: "If the international football authorities, or even the national ones, decided not to play the match at Salerno, I would not lift a finger to prevent that."
Salvatore Orilia, head of the various Salentinana supporters' clubs, said: "I am president of a co-ordinating committee with 11,000 members and I have to confess my shame and mortification at what happened last night.
"There aren't words to describe the person who threw the firecracker - in five minutes, he destroyed all our work over the last five years. I hope they find him quickly and give him the punishment he deserves."
