Harnwell has crashed in three goals in four games after returning from injury and both player and coach are keen for him to continue in a Glory shirt for some time yet.

Harnwell scored two goals in Glory's 4-0 thumping of Newcastle Jets on Boxing Day, taking full advantage of Dadi's absence - the player having called in sick after being set to start.

"Eugene was going to be part of the team, but phoned up sick in the morning. That was unfortunate because he was going to play. He will be away from recovery as well because the doctor didn't want him coming in," Mitchell said.

"He phoned in and said he wasn't feeling well. Maybe he had some dodgy turkey, I don't know. There was the possibility he might have started. I haven't discussed it (his future) with him, but I know there is a club that is quite interested in him so if he can't break into the side and wants to leave, that might be beneficial."

As long as Mitchell remains coach of Glory, he wants Harnwell to be part of his squad.

"He has a nous for scoring up front. I think highly of him and he knows that. I've had a few heart to hearts with him over the past couple of years and the character of the guy always stands up," Mitchell said.

"He is Mr Dependable and sometimes we throw him in when he's not quite ready, but you know what you're going to get. He still scored two goals, is a threat and we know what we will get if we get good balls to him. If I'm going to be here then for sure (he will be part of the team)."

Harnwell has never made any secret that he wants to continue on with Glory for as long as possible and is confident he's done enough to earn at least one more campaign with the club.

"Hopefully we will start talking soon now. I've made a case now to be playing next year and deep down I've always wanted to. My dad's always said that you are a long-time retired and I want to keep going as long as I can," Harnwell added.

"Hopefully that's at Perth Glory, so I want to sit down and sort something out for a long time to come and I want to be part of this club for a long future because it's been a massive part of my life. I couldn't imagine going back to an office job or something like that, so I want to stay in the game as long as I can."