Besiktas are interested in Watford fullback Pervis Estupinan.

Currently on-loan with LaLiga Osasuna, the defender's form this season has attracted interest from across Europe.

Ecuadorian media sources say amongst the enquiries has been one from Besiktas which are keen to discuss a new loan arrangement with Watford for next season.

Last month, Expreso reported Manchester United had joined Chelsea in the race to sign Estupinian.

Osasuna signed the 22-year-old on a two-season loan last summer and he quickly made the left-back spot his own as the LaLiga side steered clear of relegation trouble.