The fullback comes off contract at the end of the season and intends to leave in June.
Local reporter Gerard Romero says Mazraoui has told agent Mino Raiola he wants to move to Barca next year.
Raiola met with Barca president Joan Laporta last week in Paris where they discussed several of his clients, including Mazraoui.
The Ajax defender would arrive to replace Sergino Dest, who is also a Raiola client and expected to be sold - potentially as early as January.
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