According to Sky Sport Germany, the 29-year-old has emerged as a potential defensive reinforcement for the Serie A and Premier League sides after establishing himself as an important figure at Birmingham.
Neumann is currently playing in the Championship, where his performances have attracted attention beyond England’s second tier. Nottingham Forest are assessing the possibility of bringing him into the Premier League, while Fiorentina are also following his progress as they consider options to strengthen their defence.
A move during the winter window is possible, although neither club has been reported to have completed an agreement with Birmingham.
The German defender has built up considerable experience during his career, having previously represented Schalke 04, FC Ingolstadt, Holstein Kiel and Hannover 96. He moved to Birmingham after leaving Hannover and has since become a regular presence in the English side’s defence.
His current contract runs until 2028, meaning Birmingham are under no immediate pressure to sell. The club will also be reluctant to lose an established defender during a season in which they are pushing for promotion.
Neumann’s performances have made him an important part of the team, and the interest from clubs in two of Europe’s major leagues represents a significant opportunity for the former Germany youth international.
For Fiorentina, the attraction is the possibility of bringing in an experienced central defender from the English game. Nottingham Forest, meanwhile, could offer Neumann the chance to step up to the Premier League without leaving England.
The Italian club have been looking at defensive options ahead of the next transfer window, and Neumann has emerged as a name under consideration. His experience in Germany and his adaptation to English football make him an interesting candidate for the Viola.
However, the reported interest has not yet developed into a formal offer. Birmingham retain control of the situation through the defender’s contract, and any January departure would depend on whether either interested club is prepared to meet the Championship side’s expectations.
Neumann’s immediate focus remains on Birmingham, but the attention from Fiorentina and Nottingham Forest could make him one to watch when the winter transfer window opens.