Adelaide United's Josep Gombau will coach the A-League All Stars in their match against Italian powerhouse Juventus.

Football Federation Australia (FFA) will officially announce Gombau's appointment on Tuesday.

The Spaniard, in his first season as Adelaide coach, was selected by fans as coach for the August 10 fixture in Sydney.

More than 16,000 votes were received from fans to select the coach, with Adelaide's supporter base initiating a social media campaign to get Gombau appointed.

Fans will also select the playing squad by voting from Tuesday on the A-League All Stars' website - with the poll closing on May 4.

AAP