Bayer Leverkusen have joined Arsenal, Chelsea, Manchester City and Liverpool in the race to sign highly-rated Hamburg star Hakan Calhanoglu this summer.
TalkSPORT reports how the 20-year-old midfielder has attracted attention from a host of top European clubs, following an impressive individual campaign in the Bundesliga.
Calhanoglu has scored 10 goals and contributed three assists this term, prompting Hamburg to offer him a new contract, extending his stay at the BayArena until 2018.
However, with the club embroiled in a relegation battle there have been suggestions that the Turkey international could in fact still leave at the end of the season.
Gunners boss Arsene Wenger has been credited with an interest in bringing Calhanoglu to the Emirates Stadium, but faces stiff competition from rival suitors for the player's signature.
Jose Mourinho has also been mooted as an admirer of the talented youngster, as have Brendan Rodgers at Liverpool and Manuel Pellegrini at Manchester City, meaning that transfers to Stamford Bridge, Anfield or the Etihad Stadium remain a possibility too.
The four Premier League clubs chasing Calhanoglu will now face additional competition from Germany, after Leverkusen boss Sascha Lewandowski was added to the Hamburg starlet's growing list of admirers.
Where Calhanoglu will end up at this stage is anyones guess. He could even remain at Hamburg providing they retain their top-flight status.