Photo: Manchester United unveil signing of Argentine international Sergio Romero on three-year deal

Manchester United have completed the signing of Sergio Romero.

Manchester United have completed the signing of goalkeeper Sergio Romero.

The Argentine international was a free agent after letting his Sampdoria contract run down, and has signed a three-year deal.

Romero is a player Louis van Gaal knows well from AZ Alkmaar in Holland, signing him in 2007.

The goalkeeper is 28-years-old, and featured at the World Cup for his country last summer.

He will replace Victor Valdes who is expected to exit the club, while the future of number one David de Gea remains unclear.

If De Gea is eventually sold, United have a goalkeeper who clearly has the trust of Van Gaal, even if he is only a stop gap option.

Romero told the club's official website: "I am absolutely delighted to join Manchester United. To play for the biggest club in the world is a dream come true for me.

"Louis van Gaal is a fantastic manager and I cannot wait to get started on this new and exciting challenge in my career."

He becomes the club's fifth summer signing, following Memphis Depay, Matteo Darmian, Bastian Schweinsteiger, and Morgan Schneiderlin.

The Red Devils are expected to intensify their pursuit of a striker over the coming weeks.

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