Barcelona have sold striker Rey Manaj to Championship side Watford, with the Catalan giants retaining the right of first refusal on any future move for the Albania striker.

Manaj, who has 30 senior international caps, will join Rob Edwards' side on a three-year deal as they bid for an immediate Premier League return after suffering relegation last season.

The 25-year-old impressed when linking up with Barca's first team for pre-season last year and has Serie A experience with the likes of Inter, Pescara and Spezia.

While Watford did not disclose the fee paid for Manaj, an official statement from Barcelona revealed the club retained first refusal on the striker and will also pocket 50 per cent of any future transfer fee.

Manaj joins the likes of Clement Lenglet and Philippe Coutinho in securing moves away from Camp Nou during the transfer window, while Adama Traore and Luuk de Jong left after their loans ended.

Dani Alves and Ousmane Dembele are both unattached after their contracts expired, though the latter is expected to sign a new deal.