Atlético Madrid has been heavily linked with the signing of a new defender in January, with their main target being a player from the Bundesliga.

The Spanish club is known for its strong defense and has already made some significant signings this season, including the likes of Koke and Joao Felix. However, they still need to strengthen their squad and add more depth to their backline.

According to reports, Atlético Madrid's top priority in January will be to sign a defensive midfielder or a full-back. However, they have also expressed interest in signing a central defender who can play alongside Diego Godin and Jose Gimenez.

One potential target for Atlético Madrid could be Stefan Frei, who currently plays for VfL Wolfsburg. The Swiss international has been praised for his defensive skills and has been named as one of the best goalkeepers in Europe by several publications.

Another option could be Benjamin Sartorius, who plays for Eintracht Frankfurt. The German defender has been in great form this season and has helped his team to win several important games.

Regardless of which player Atlético Madrid decides to sign, it's clear that strengthening their defense is a top priority for the club. With the right addition, they can improve their chances of winning major titles and continue their impressive run of success in La Liga.