Reports in Italy suggest Alessandro Del Piero has turned down Sion’s offer, so it’s between Celtic, Sporting Braga and Sydney FC now.
The former Juventus legend met with Sion directors on Wednesday and their proposal was outlined in detail, but was not enough to impress him.
According to Sky Sport Italia, Del Piero has rejected the opportunity to join Gennaro Gattuso in Switzerland.
Italian media suggest Celtic are now in pole position, as they have qualified for the Champions League and Scotland represents a new adventure for the 37-year-old.
Other options are Sporting Braga – who also reached the Champions League group phase after eliminating Udinese on penalties in the play-off – and Australians Sydney FC.
Tottenham Hotspur have dropped down the likely list of candidates after being linked to Del Piero earlier this week.
Think you know your Italian football? Share your knowledge, tips and comments to win cash prizes in OLBG's World Cup tipster competition - £10,000 to be won!