Borussia Dortmund keen on Hannover ace

German newspaper Bild says Borussia Dortmund are closely monitoring the situation of the 23-year-old.

BVB coach Juergen Klopp is looking to strengthen his squad in the January transfer window and sees Rosenthal as a perfect signing.

Rosenthal’s contract with Hannover is set to expire in the summer of 2010.