The latter went off after scoring his 69th minute goal but Joyce is hopeful that his discomfort was nothing serious.
»Hopefully the little cramp in his calf is nothing serious and he gets into training straight away next week.»
The coach is optimistic the duo will give his team the firepower and grunt needed to improve results and climb the table — but he says the next three months will be a huge test of character for 21-year-old Harrison as he looks to prove to Tottenham boss Mauricio Pochettino that his spell in Australia has made him a better player.
Spurs sent him to City to gain experience in a tough league against senior players. He got that on Saturday night.
»I have worked with young players a lot. You can put high demands on them but a big bit for him is you don’t know how much he can achieve,» Joyce said of Harrison.
»He has got talent, it’s making the most of the talent he has got. [We will be] putting some demands on him, really being tough on him, challenging him. He’s prepared to work as well [and] know you he has got ability.»
Joyce was not giving the young Londoner any targets to hit.
»I think it’s limitless. When you are a kid, very quickly you can turn things round, and if you have got that amount of talent he’s got.
»Harry Kane [Tottenham and England captain], Jesse Lingard [Manchester United and England] had loan spells where they were both doing all right, doing not so great, you speak to people at different clubs and they were not doing that well there.
»But then all the things add up and somewhere down the line things click into place with the good habits they have been taught and being at the right place at the right time, and they can go through the roof.
»The experiences that you can get that are hard but they help develop you for the future and the next one [move] might the one in which you are flying.
»We are looking to help him develop his career and for him to help us along the way.»
Qualifying for the Asian Champions League is as much a goal for Melbourne City as winning the A-League, and both Harrison and Maclaren will have to deliver if they are to do one, never mind both.
City have struggled for goals since marquee man Bruno Fornaroli was banished to the bench in round five.
Maclaren did what Joyce and the City hierarchy hoped he would, scoring the equaliser in a game that would have delivered a massive blow to the club’s aspirations had it been lost.
The Australian international is a penalty box player who works hard and hustles, and it was his pressing that put the Adelaide defence under pressure to eventually set up his goal midway through the second period.
He will get better as he adjusts to his teammates and acclimatises.
»Jamie is a Melbourne lad, but he is still getting used to flying in, getting his bearings. He’s had no sleep, trying to get to training, trying to integrate with the group.
»It’s been a whirlwind few days for him. I don’t think he’s just limited to that [being a penalty box player], he’s got every type of finish in his locker. This is a good start for him.
»Obviously with the training loads three days this week he’s trying to get some integration with the lads. He’s probably done more this week in training than he’s done for a long time.»