Sion are in talks with Mario Balotelli, according to the Swiss club's president.
Former Inter, Manchester City, Liverpool and Milan forward Balotelli spent last season in Turkey with Adana Demirspor.
The Italy international scored 18 Turkish Super Lig goals as the team finished ninth, with only Kasimpasa's Umut Bozok managing more strikes in the competition (20).
That tally included a stunning five-goal haul on the final day against Goztepe, making top-flight history for Adana Demirspor in the process.
Balotelli is under contract until 2024, though the 31-year-old seems to be pushing for a move away, having suggested he could move to LaLiga, with Valencia said to be interested.
However, Sion's president Christian Constantin has confirmed his team are in discussions with the player.
In an interview with the Swiss-German publication Blick, Constantin said: "It's true. We've been in talks for weeks.
"Today it is impossible for me to make a forecast about the chances of success of the transfer.
"We wanted to remain discreet, but the information apparently leaked in Italy. This is a signal that there is interest on both sides."
Signing Balotelli would represent a coup for Sion, who will be looking to improve on a seventh-place finish last season, with their Swiss Super League campaign starting on Sunday.
"If you only talk about talent, Mario had what it takes to win the Ballon d'Or," Constantin added.
Constantin also revealed Sion were interested in signing Balotelli back in 2016, before the forward moved to Nice.
"The first time we spoke to [Balotelli's former agent] Mino [Raiola] about Mario was in 2016, before he signed in Nice," Constantin added.
The president's son Barthelemy, Sion's sporting director, added: "We've been in contact with his agents for a long time and have a good relationship. We've done a few deals together in the past."