Barca beats Bayern to Dest signature

FC Barcelona

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The deal will include Barca paying €21 million ($34.6 million) for the 19-year-old, with a further €5 million ($8.3 million) in variables. 

"The player will sign a contract for the next five seasons, through to the end of the 2024/2025 season, with a buyout clause set at €400 million [$660 million)," a Barca statement read. 

Dest will offer competition at right-back after Nelson Semedo was sold to Wolverhampton Wanderers. He made 35 appearances for Ajax last season, after making his debut in July. 

The United States international becomes Barcelona's fifth arrival of the transfer window, joining Miralem Pjanic, Trincao, Pedri and Matheus Fernandes in moving to Camp Nou. 

The signing also continues the club's attempts to refresh the squad.

"It's a matter of changing things, having young players for the future of this Barca," Ronald Koeman said when asked about Dest.

Barcelona's statement added: "Sergino Dest combines many excellent qualities needed in a full back: attacking when called for, solid defensively, unruffled in possession and creative with it.

"The defender has the ability to take players on and his pace is a virtue going forward and defending. Those qualities will be on display from now on in a Barca shirt, a challenge for a fearless young full back."