Several foreign clubs have shown interest in Markus Karlsson, who has been one of Allsvenskan's best central midfielders for several seasons. In the summer, Hammarby sporting director Mikael Hjelmberg stated that there was specific interest in Markus Karlsson. Hammarby rejected that interest. Markus Karlsson changed agent in early October, leading to speculation that a move may be possible in the winter.

Mikael Hjelmberg revealed that Hammarby received bids for their 22-year-old Swedish central midfielder, Markus Karlsson, during the summer. According to Hjelmberg, there has been concrete interest in Markus Karlsson, but the club rejected the bids. Karlsson's contract with the club is valid until the end of 2029. He has 12 caps for the Sweden U21 national team and has made 19 appearances in the Allsvenskan this season, providing 2 assists. Transfermarkt estimates his current market value to be €7.00m.