Barca put Firpo up for sale at the end of last season and now Leeds are a step away from striking terms.
Sport says Marcelo Bielsa's Leeds is about to close a deal for Firpo at a price of €15m.
Under contract until 2024, the left-back was hardly used last season by Barca coach Ronald Koeman. He managed seven matches in LaLiga, including three as a starter.
Firpo joined Barca two years ago from Real Betis.
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