Blues signed highly-rated Danish defender Kristian Pedersen on 25 June 2018.
The left-back joined on a four-year contract from German side Union Berlin, for an undisclosed sum.
Born in Ringsted, Denmark, Pedersen spent two seasons in Germany, where he caught the eye of several sides in England and mainland Europe.
Blues beat off significant competition to secure his services.
Pedersen, who stands 6ft 2in tall, made his way up the ranks in his homeland. He was with HB Køge from 2014 until the move to Germany.
Capped five times at Under-21 level, Pedersen has also been used wide left of midfield.
But his strength is at left-back, a position where his size, power and determination came to the fore in the German second division.
Pedersen made his Blues debut in the opening Sky Bet Championship game of the 2018/19 season against Norwich City which ended in a 2-2 draw.