The two cross-city rivals met last week in a match-up that saw Aloisi’s men repeatedly draw the referee’s attention as they tried to wrestle the ball away from the former Juventus star.
One of the fouls led to a penalty which sealed Victory’s fate with a final 3-2 score-line against their favour.
"We have spoken to our players a little bit about Del Piero, about what he's like as a player," Aloisi said.
"If you get too close to him he can actually dribble you or draw a foul. And it's not that he's diving, it's just that he's a smart player, an intelligent player.
"And then if you're too far off of him, he can pick out a pass that can hurt you. So you have to be at the right distance, not be afraid of him, but just make sure you're winning the ball and not hitting Del Piero."
The Heart’s manager has insisted that he sees no foul play in the way Del Piero handles himself on the pitch, and has said that his team are working on a strategy to deal with the dangerous forward.
"They a tough side, they've got players like Del Piero who can make a big difference to them," he said.
"Del Piero is so dangerous when he's got the ball, you have to expect that he can play any pass, even if you think he hasn't seen it because he has.
"But we still think there's opportunities to hurt Sydney FC. They're a good side, they've got good players. They actually play really well on the break - we just have to be really careful of that."
Melbourne Heart has yet to register a win this season, and will be without defenders Tiago Calvano and Marc Warren for Friday’s clash with Frank Farina’s team.
"Pedj Bojic will probably come in and I'm not sure if they'll switch Seb Ryall to the middle," he said.
"That'll be a bit of a weakness for them, because they haven't played together and hopefully we can take advantage of that."