Barcelona have joined the interest in Watford defender Pervis Estupinan.

The fullback has shone this season in Spain on-loan with Osasuna.

Sport says his form has caught the eye of Barca scouts as management seek a new fullback signing for next season.

Barcelona are ready to offer €10m for the Peru left-back - and Watford is said to be ready to sell the 22-year-old.

Estupinian is also interesting Chelsea and Manchester United.

Ecuador's Expreso reports United have joined Chelsea in the race to sign Estupinian in the past month.

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.