Spurs scouts were reportedly in Germany to watch him this year.
It was reported by The Mail in March that Spurs scouts had watched the 24-year-old and were weighing up a £10 million summer bid.
Tottenham's reported interest has gone cold in recent months, but Fotospor claimed today that Fenerbahce were keen to bring him to Istanbul as part of a summer revamp.
It is easy to see why the Turkey international is so highly rated, having netted 11 Bundesliga goals last term, along with grabbing five assists in all competitions.
But he would be in direct competition with Dele Alli if he were to join up with Mauricio Pochettino's side, meaning his first-team chances may be limited, given the 20-year-old's talent.
With that being said, Alli's continued development may be accelerated by competition of that calibre. At the moment, there is nobody nipping at his heels in regards to displacing him, so signing a top number 10 to rival him may be beneficial for all parties.