Town are being linked with a move for Celtic left-back Lee Naylor. The 29-year-old is out of favour at Parkhead and with his contract up in June is likely to be available for only a small fee.
Bloxwich-born Naylor started his career with Wolves for whom he made more than 300 appearances between 1997 and 2006, prior to joining the Bhoys for £600,000.
Despite having played in Saturday’s 1-1 draw with Falkirk, Naylor has generally been out of Tony Mowbray’s plans since he took over from Gordon Strachan at Celtic and the 5ft 10in tall former England U21 international is expected to be amongst a number of players leaving in January.
Greek club Kavala have also been linked, but Naylor is understood to prefer to remain in the UK.
Naylor wasn't involved in the recent Celtic-Rangers game watched by Blues boss Roy Keane.
Elsewhere, Birmingham City midfielder Damien Johnson is also claimed to be a Town target, although the Blues seem unlikely to look at signing another central midfielder in the transfer window. Northern Irishman Johnson, 31, is reportedly surplus to requirements at St Andrew's.
Meanwhile, Hertha Berlin are considering offering a deal to former Town loanee Moritz Volz. The full-back has been without a club since being released by Fulham in the summer, having recently failed to win himself a contract during a trial at Schalke 04.