Kostas Triantafyllopoulos in action for Panathinaikos
Cardiff City and Birmingham City are tracking Greek defender Kostas Triantafyllopoulos, sources close to the club have told HITC Sport.
Triantafyllopoulos has caught the eye at Asteras Tripolis with a number of commanding performances at the heart of their defence in the Greek Super League.
The powerful centre-back came through the ranks at Greek giants Panathinaikos and made 63 appearances for the club before joining Asteras Tripolis in January 2016.
Triantafyllopoulos has established himself as a key man in the Asteras Tripolis and his displays have brought him to the attention of several clubs across Europe.
Cardiff and Birmingham have both sent scouts over to Greece to cast an eye over Triantafyllopoulos at close quarters and they have been impressed by what they have seen.
Birmingham are planning to strenghten their squad in January as they look to climb away from relegation trouble, and Blues boss Steve Cotterill has made defensive reinforcements one of his top priorities.
Cardiff boss Neil Warnock is also looking to add to his defensive options in the New Year as he looks to maintain his side's push for promotion to the Premier League in the second half of the season.