Despite enjoying a productive season at Benfica last year, getting 12 goals and 11 assists in all competitions, the Turkish international has decided to move on following a heated argument with head coach Bruno Lage. The midfielder grew frustrated after being substituted during a Club World Cup match against Auckland City and reacted angrily on the sideline.
The Portuguese club reportedly set a price tag around €40 million (£34m/$46m), with Newcastle, Liverpool, Manchester United, Inter and other clubs keen to sign the midfielder. Galatasaray and Fenerbahce also made contact with the player, but Kokcu has made Besiktas his preferred destination.