Celtic have made a shock approach for a former Juventus and Tottenham star.
The Hoops hope to tie up 31-year-old Sion captain Reto Ziegler to a deal and have already offered a contract, according to the player.
But the Parkhead club could face competition from his signature amid reports that La Liga side Real Betis have also offered him a deal.
Asked about the rumours, Ziegler said: “That’s true. But before I meet with those two clubs, I will also meet with the people who run Sion to find out more.
“The offers from Celtic and Betis are an honour for me but without wanting to sound snooty, I think I deserve it, I’ve had a good season.”
“I am getting married at the weekend and if I moved to Scotland, she would want to move abroad again with me I hope!
“But we are not there yet.”
Ziegler has played in Switzerland, England, Italy, Germany, Russia and Turkey and has played in the past two World Cup for his countries.
He has spent the last three seasons at Sion and is regarded as one of the most consistent defenders in the Super League.