Rockdale City have removed Paul Reid as coach after the Suns' disappointing start to the NPL 1 season.
The Suns announced via a statement on their Facebook page on Monday night that Reid had been let go with Rockdale second last after one win from their opening five games.
The Suns, celebrating their 50th anniversary season, have promoted youth technical director Nick Porreca as interim head coach.
Porreca took charge of the first grade team for their 3-0 win over NPL 2 club St George City in the fourth round of the FFA Cup on Wednesday night.
Reid, who initially joined Rockdale as a player in 2013, took over as coach early in 2015 after Branko Culina's departure.
The former Socceroo led Rockdale to the FFA Cup round of 16 that season, where they were beaten by A-League powerhouse Melbourne Victory at Jubilee Stadium.
Reid also took the Suns to the FFA Cup round of 32 last season, where they lost to Sydney FC at the Ilinden Sports Centre.
Reid had led Rockdale to league finishes of sixth, fourth, third and fifth but appears to have been discarded due to the Suns' poor start to the 2019 campaign.
"After a run of disappointing results, Rockdale City Suns have today parted ways with head coach Paul Reid," the statement read.
"The club would like to thank and acknowledge the contribution made by Paul both during his playing days and more recently as head coach.
"Paul stepped up as player coach when needed and played a big part in the revival of the team that year.
"The decision was not an easy one to make but the board of the club are determined to see the club revive its fortunes in 2019 with everything to play.
"We urge our loyal supporters to get behind Nick and the team."
The statement was met with a number of negative comments from the club's supporters online.
Clubs compete in Cup
Meanwhile, a number of local teams were in fourth round action in the FFA Cup on Wednesday night.
Rockdale City won their derby clash with NPL 2 club St George City 3-0 at the Ilinden Sports Centre.
Sutherland Shire Football Assocation club Kirrawee thrashed Thornleigh 6-0, while Cronulla Seagulls lost 7-0 to Bonnyrigg White Eagles.
St George Football Association clubs Hurstville Zagreb and Hurstville City Minotaurs went down 2-0 to University of NSW and 6-2 to Mounties Wanderers respectively.