Journalist and transfer market expert Fabrizio Romano has reported that Portuguese club Porto is working on signing Barcelona defender Mika Márquez.

Romano confirmed that Porto is set to make an offer of €15 million to secure the services of the young defender this summer.

The source added that Barcelona is keen on including a buy-back clause in Márquez's contract, as the club does not want to lose him permanently.

Many clubs have shown interest in acquiring the young player.

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