Hoffenheim striker Chinedu Ogbuke has been linked with a move to four of the leading clubs in the Premier League.
The 22-year-old is reportedly being tracked by Manchester United, Liverpool, Chelsea and Arsenal.
The news is likely to alert the Nigerian international's former club FC Lyn-Oslo with the Norwegians set to benefit from any sale.
Ogbuke joined the surprise Bundesliga leaders in August 2007 after scoring 14 goals in 29 games for Lyn where he played alongside Chelsea midfielder John Obi-Mikel.
The striker has continued his goal scoring form in Germany finding the net 18 times in 39 games, six of those coming this season.
"He is an attractive player for many clubs, Hoffenheim too," Lyn-Oslo director Erik Langerud told Aftenposten.
"He might leave now, in the summer or next summer."