Dylan McGowan joins Portuguese Liga side Pacos Ferreira

Adelaide United have lost A-League defender Dylan McGowan to a top-flight Portuguese club.

McGowan has signed with Pacos Ferreira in a deal sealed in-principle in January.

"I had bigger-money offers from all over Asia, most notably from Korea," McGowan told Fox Sports.

"But I wanted to give myself a really good chance of making the Socceroos and show that ambition that's required to be in the national team.

"Hopefully, this move can put me in the window for that and then I can play well enough to get that chance."

McGowan's departure comes amid sweeping changes at the Reds, who are looking for a new coach after the resignation of Guillermo Amor.

Captain Eugene Galekovic, midfielder Marcelo Carrusca and winger Sergio Cirio are among a batch of Adelaide players weighing up their futures.