The Israel international has apparently been scouted by a number of clubs – including the Black Cats – although the fact he recently signed a new long-term deal at Parkhead means he will not come cheap.
The 24-year-old has pledged his future to the Bhoys for five years which means it will take big money to take him south of the border.
Sunderland’s perilous position in the English Premier League would also be a factor for the player as there is a very real chance the Wearsiders could find themselves playing Championship football next season.
Meanwhile, Celtic’s hierarchy could be on red alert after former midfielder Roy Keane revealed he wants to make a return to club management.
The 44-year-old is currently the number two under Republic of Ireland boss Martin O’Neill and has helped the side to reach Euro 2016 next summer via a play-off victory over Bosnia-Herzegovina.
However, in the longer term the Manchester United legend wants to get involved day-to-day again following previous stints in charge of Sunderland and Ipswich Town.
Keane will be part of O’Neill’s backroom staff at the European Championship in France although it appears he will not be hanging around after the conclusion of Ireland’s campaign.
He said: “I’m planning to meet the manager just to have a chat, to see where he stands, but I think that Martin knows I have that ambition to get back in the ring.
“I’m not really one for networking or applying for jobs, but I’m enjoying my role here. I certainly want to stay on for the Euros, then we’ll play it by ear.”