5 emotional goodbyes of the winter transfer window

#2 Neven Subotic (Borussia Dortmund to Saint Etienne)

Subotic's first team comeback this season was short lived

Serbian center back Subotic joined Dortmund from Mainz in 2008. He was an immediate hit at the Signal Iduna Park, turning heads with his impressive defensive displays.

In the 2009/10 season, he played every single minute of every league match. He eventually won the Bundesliga in 2011 and 2012. His rock solid defensive partnership with Mats Hummels was the foundation of Dortmund's tremendous success in the early part of the decade.

He was pretty much the first choice up until the 2014/15 season. He played an integral part in their immensely successful 2013/14 Champions League campaign which ended in a 2-1 loss in the final to rivals Bayern.

Bayern's dominance in the Bundesliga coincided with the Serbian's fall from grace. He's still only 29, which is still young for a defender, but a few health issues over the last couple of years (particularly thrombosis in his arm in 2016) allowed other players like Sokratis stake their claim for a first-team spot.

A loan move to FC Koln effectively signaled the end of his time in Dortmund. A brief comeback under Peter Bosz was cut short when the Dutchman was sacked, leaving him no other option but to join Saint-Etienne on an 18-month contract.