The 17-year-old made his debut for Armadale last season but never managed to cement his spot in the National Premier League side; now he has found himself as the starting left back.
Armadale has had a tough season so far and is in 11th position with three wins.
Sardelic, of Beaconsfield, played most of his junior soccer at Fremantle United.
He moved to East Fremantle as he got older and then made the transfer to Armadale.
Sardelic said from a young age he was pretty good and he used to practise all the time.
Although Armadale is struggling, Sardelic said it was one of the youngest squads in the competition.
�New coach Paul Price has been good and made a few changes with a new philosophy,� he said.
He described himself as pretty relaxed but hard working when it came to soccer because he wanted to get better.
�I have got good pace to keep up with wingers and good strength on the ball,� he said.
�I need to work on my position in left back because sometimes I just get caught out.�
Although Sardelic is enjoying playing in the National Premier League, he knows he has to keep up the hard work to stay in the side.