Following their run of six wins in the first nine games of the Bundesliga campaign, Hoffenheim have only managed one more win.
In a similar fashion, this win came all the way back in early December against VfL Bochum.
Another warning sign for Hoffenheim ahead of their clash with Köln will be their lack of home form.
This lack of form at home has seen them with the fourth-worst home record in the Bundesliga this season.
In spite of this, Hoffenheim have proved to be a tough fixture for Köln as they have only lost one of twelve games against the Billy Goats.
Even though they won on Saturday, Köln were unable to move above bottom place in terms of goals scored as a club in the Bundesliga.
The carnival side have only managed a record low fourteen goals in the 2023-24 Bundesliga campaign.
For Hoffenheim, Marco John has sustained a knee injury and will be unavailable for Sunday's game.
John Brooks is also out but due to a yellow card suspension ahead of the Köln tie. Mergim Berisha will be out with a knee injury and midfielder Finn Ole Becker will be a doubt ahead of the match due a knee issue.
1. FC Köln
Mark Uth has sustained yet another knee injury and therefore will miss the game on Sunday. Youngster Justin Diehl is unavailable due to illness despite having rejoined training.
Both Timo Hübers and Philipp Pentke are doubts due to illness and back problems respectively.
Baumann (c); Kabak, Grillitsch, Nsoki, Kadeřábek; Stach, Prömel, Bülter, Kramarić; Weghorst, Beier
1. FC Köln:
Schwäbe (c); Schmitz, Chabot, Heintz, Finkgräfe; Huseinbašić, Martel, Ljubicic, Kainz (c), Alidou; Thielmann
TSG Hoffenheim - Maximilian Beier
Scoring eight goals this season, Maximilian Beier has been a source of consistent goals for a very inconsistent Hoffenheim side.
Partnering in attack with the tall but prolific Wout Weghorst, Beier has managed to fuel Hoffenheim's efficient striking force this season.
Between the two players, they have managed thirteen goals this campaign.
His powerful and precise right foot has proved a problem for many goalkeepers but 1. FC Köln's Marvin Schwäbe is one of the toughest opponents for strikers in the Bundesliga.
Beier is often implemented in a two-striker attack and likes to play off a main, tall striker as a secondary strike partner.
1. FC Köln - Dejan Ljubicic
Having been implemented by head coach Timo Schultz in a new position at left midfield, Dejan Ljubicic produced a standout performance against Eintracht Frankfurt.
Always running heavily throughout games with purpose, Ljubicic also ranks fifteenth in the entire Bundesliga for overall intensive runs.
The Austrian had attracted the likes of VfL Wolfsburg in the summer, but with the club refusing to sell him for the asking price he stayed at Köln.
Ljubicic also has overtaken Florian Kainz's role as a wide midfielder and a goal creator (with Kainz amassing a superb ten assists last campaign).
Where is the match being played?
The match is being played at the Rhein-Neckar-Arena in Sinsheim, Baden-Württemberg.
What time is kick-off?
The match is set to kick-off on Sunday at 16:30 (GMT) and is the last game of the Bundesliga match week.
Where can I watch?
Viewers in the UK can watch the game on Sky Sports Football or via the Sky Sports App, with coverage starting at 16:30.