FC Midtjylland defender Erik Sviatchenko is a reported target for a number of clubs.
Sviatchenko, 24, has come up through the ranks at Midtjylland having arrived from Viborg in 2006, and is now one of their star players alongside the likes of Pione Sisto and Tim Sparv, helping Midtjylland win their first Danish Superliga title last season.
Now though, interest is building in Sviatchenko's signature, having now made four appearances for the Danish national team - despite being eligible to play for Ukraine through his father.
The 6ft 1in centre back allegedly had a £1.5m release clause in his contract, according to the Daily Mail, and they report that there are a number of clubs looking to sign him in January.
Celtic may still need defensive reinforcements even after signing Jozo Simunovic, Dedryck Boyata and Tyler Blackett over the summer, and Norwegian manager Ronny Deila will certainly be familiar with Sviatchenko from his days managing in Scandinavia.
Meanwhile, the Premier League sides Bournemouth, Stoke and West Brom could all be in the market for a new centre back in January, and a £1.5m bargain deal for Sviatchenko unsurprisingly seems appealing to all three.