In recent years, German football clubs have been investing heavily in their defense. SC Freiburg, one of Germany's top teams, has also been making significant investments in its defense. This is not only because of the club's success on the pitch but also because they want to continue to improve their defensive performance.

The club has already signed Swiss international defender Oliver Fassnacht for the rest of the season. The move comes after Fassnacht had impressed in his previous spell at SC Freiburg and was expected to be a key player this year.

Fassnacht has already made a big impact on the team, scoring three goals in six appearances so far. He is known for his technical skills and ability to read the game, which is essential for a defensive midfielder.

However, the club is keen to strengthen its defensive core. They have already signed young goalkeeper Florian Schreiber from Switzerland, who will join the team from FC Augsburg. This is another addition that should help the team's defense to improve further.

SC Freiburg has also invested in their youth academy, with plans to create more opportunities for young players to develop their skills. This is important as it can help to build a strong talent pool for the future.

Overall, SC Freiburg's investment in their defense is paying off, as they have already seen results. With the signing of Fassnacht and Schreiber, they are now in a strong position to improve their defensive performance even further this season.