There seems to be a real feel-good spirit around Birmingham City fans right now following the signing of Croatian midfielder Alen Halilovic.

The former Barcelona and A.C. Milan player has penned a deal until the end of the season, and Aitor Karanka will be hoping the 24-year-old brings some much-needed creativity to the middle of the park.

The Blues currently sit 17th in the Sky Bet Championship, and it's clear to see what positions they are stronger on the field as they've conceded just 12 goals.

Karanka has built his foundations on a solid defence, which seems to be a theme at whatever club he manages, and today he comes up against another in the form of Millwall.

The Lions sit in 10th spot and ended up just two points off a play off spot last season, with Gary Rowett a popular man with the Millwall fans for his managerial acumen.

He's built a really good team for this level, and we've picked out two of the dangers that Birmingham need to be wary of this afternoon.

Jed Wallace

Wallace would fit into the majority of teams at this level, and after a double-double 2019/20 season with 10 goals and 13 assists, he's started off this campaign where he left off.

The winger has notched five goals already, including a stunning free kick against Reading in midweek, and provides a threat all over the pitch.

He comes up against one of the best left backs in the division today in Kristian Pedersen, in a match-up that will be really interesting to witness.

Jake Cooper

There is always one main target when it comes to Millwall's set pieces, and that is the giant that is Jake Cooper.

The almost-6ft 7in centre half towers above all his opponents, and whilst he only has one goal to his name so far this season, he's surely bound for a few more if Wallace can get his deliveries spot on.

And like a lot of modern centre backs as well, Cooper likes to play it out from the back, and you'll usually see him commit to at least one marauding run through the middle of the pitch during a game.