It's four years since Oğuzhan Özyakup left Arsenal to join Besiktas.
The deal which took the player - who a year later would become a Turkish international - was worth around £500,000. Besiktas could now be about to make a serious profit on the player.
Born in the Netherlands, he joined Arsenal in 2008 but would only play for Arsene Wenger in the League Cup.
Since then, he was really progressed as a player. He now more than 20 caps for Turkey. He played in all three of his country's games at Euro 2016.
According to Turkish outlet Fanatik, Özyakup is on the radar of Jose Mourinho.
The Man Utd manager has reportedly sought the advice of fellow Premier League manager Slaven Bilic who managed the midfielder prior to taking over at West Ham.
The player's price tag is rumoured to be £16.9 million. Last season, from a goal scoring perspective, was his most successful for Besiktas, netting ten times.