Besiktas are reportedly interested in re-signing striker Cenk Tosun from Everton before the January transfer window closes.
Tosun, 29, moved to Goodison Park from the Turkish club in a £27million deal in January 2018 but has failed to hold down a regular starting place under successive Everton managers.
He has played just 164 minutes of football this season, making five substitute appearances in the Premier League and starting only against Championship side Rotherham United in the FA Cup third round, a game in which he scored.
Sky Sports report that Besiktas are keen to re-sign Tosun, who scored 64 goals in 142 appearances for the club between 2014 and 2018, while there is also interest from Russian club CSKA Moscow.
Tosun had been linked with a reunion with Sam Allardyce, who signed him for Everton, at West Bromwich Albion earlier in the window.
But the Baggies have since agreed the loan signing of forward Mbaye Diagne from Galatasaray.
Besiktas are currently two points clear of their Istanbul rivals Fenerbahce at the top of the Turkish Super Lig table and have also been linked with the former Brazil international Hulk, who has left Chinese club Shanghai SIPG.
Tosun has netted 11 times in 58 Everton appearances and spent a portion of last season out on loan with Crystal Palace before suffering an anterior cruciate ligament injury.
He returned to Everton for his rehabilitation, with the injury ruling him out until the start of November.
However, it's highly unlikely he will move above Dominic Calvert-Lewin and Richarlison in Carlo Ancelotti's pecking order up front.