The veteran missed the 7-2 thumping by Central Coast, and says his team-mates will suffer if they dwell on the defeat
The Italian is set to return to the side to face Melbourne Victory on Saturday night, after missing the defeat to Central Coast with a hamstring problem.
"We talked a lot about last Saturday and it was a really bad loss for us," he told reporters.
"But if we think about it too much maybe we go on the field with some fear ... that's not positive.
"We understand it was not a good day for us, but we have another one on Saturday at home and it's a chance to change our future.
"With a big game like Saturday it could be a perfect situation for us."
When asked what areas the team needed to improve if they are to turn things around, Del Piero responded with a light-hearted reply.
"Maybe everything if we saw the last match. No, we did some good things ... we scored two goals against the Central Coast, which is not easy.
"But in the end the game last Saturday for us was very, very bad. That's why I try to joke because if we think about it too much, maybe there will be too much pressure on us."