Calhanoglu has burst on to the scene this season, hitting 11 goals and laying on four assists in a superb season for the 20-year-old, whilst he has also now made his debut for the Turkish national team - a far cry from the last two seasons where he was playing for Karlsruhe.
The starlet dubbed as 'the next Mesut Ozil' has been the star man in a terrible season for Hamburg, as Mirko Slomka's side are fighting to stay in the Bundesliga - with a playoff against Greuther Furth to come. If Hamburg are relegated, they may be forced into selling their star players.
Calhanoglu is one of the few that would attract interest, and whilst Premier League sides Arsenal, Chelsea and Liverpool have been strongly linked with a move for the playmaker in recent months, the player's agent says he would rather sign for Bundesliga rivals Bayer Leverkusen.
“From the perspective of the player, the environment at Leverkusen is favoured,” agent Bektas Demirtas said. “It would be the next step for Hakan to play internationally. They are a club who are playing in Europe, who would like to buy him and who are also prepared to pay the right price for him.
“A move to a foreign club is not in question. Bayern also plays no role, we have never favoured a move to Munich. It is important that the boy is playing. We have to think in the medium to long term," he added.
Demirtas' comments about wanting him to play regular first team football are important as Chelsea already have the likes of Eden Hazard, Willian, Oscar, Andre Schurrle and Mohamed Salah vying for players, which would block Calhanoglu's path to the first team. Liverpool would represent his best chance of playing in England, but his agent's comments seem to suggest that a move to the Premier League is not on the agenda - for now at least.