The Dutch striker was left out of Spurs' 25-man squad for the Champions League earlier this week, after failing to impress in his first season at White Hart Lane.
Altough the Premier League transfer window closed last week, players can still be transferred to clubs in Turkey, where the window does not close until Friday.
Pochettino insisted he remained part of his plans, but Fenerbahce announced that they have reached an agreement in principle to sign Vincent Janssen on loan, with Tottenham yet to confirm the move.
BİLGİLENDİRME | https://t.co/ymGZcNjz8n pic.twitter.com/XgynI3a9zC
— Fenerbahçe SK (@Fenerbahce) 8 September 2017
Janssen ha aterrizado en Estambul. El delantero holandés llegará cedido por el Tottenham. (Foto @Fenerbahce) pic.twitter.com/gsiTF4ulcA #fbsk
— Fútbol Total (@FT_Total) 8 September 2017