The club's Most Glorious Player last season, Todd has been sidelined with a knee injury for the first three games of this campaign and is currently working his way back to fitness after a bout of illness put his recovery further behind last week.

With Todd's regular companion last season, Chris Coyne, on loan in China, Glory have been forced to play veterans Harnwell and Jamie Coyne in the central defensive roles.

The pair have excelled in the last two weeks, however, as the league leading Glory kept two clean sheets on their way to wins over Melbourne Victory and Newcastle.

However, Harnwell limped off late in the clash with the Jets with a calf problem and Mitchell doesn't believe the 32-year-old will be available in time.

"Jamie's responding well (to treatment)," said Mitchell after training. "But he's probably going to be a bit short for this weekend. So he'll miss at least one week for sure."

The coach said with former Blackburn skipper Todd unlikely to play, he would look to using new recruit Josh Mitchell alongside Jamie Coyne, after defender Mitchell received a provisional clearance to play from FIFA last week, following a stand-off with his former club, Romania's Universtatea Craiova.

"Andy (Todd) can play but he's probably not quite ready yet," Dave Mitchell said. "It's one of them, that probably needs another week's training under his belt.

"We'll see how the week goes, how it pans out. We'll have a look at Mitch (Josh Mitchell) in there and Coyne.

"I think Jamie Harnwell's been fantastic in the centre of defence as has Jamie (Coyne).  The thing with Jamie Harnwell is his experience and he talks well, he's an organiser ... so you lose a little bit of experience.

"Josh, I'm sure, if he comes in, will do a good job as well."

Despite producing their best start to a Hyundai A-League season, there was still some competitive tension on display in Tuesday's training session, as goalkeeper Tando Velaphi reacted angrily to a spray from Glory assistant Ian Ferguson.

Velaphi left the training track but returned a few minutes later, with Ferguson coming up to the shot stopper and putting a fatherly arm around him as they chatted in private.

Coach Mitchell initially laughed off the incident, saying Velaphi was merely going to the toilet, but when pressed admitted the incident had occurred.

"They had a bit of a tiff, yeah," said Mitchell. "It's all right. It happens you know, a bit of a misunderstanding, it's ok.

"It was, a silly thing. Nothing to worry about."