The prolific striker will most probably miss the highly anticipated encounter, as he explained to journalists on his exit from the Paideia clinic today.
"Unfortunately there is an injury, now I will undergo therapy and evaluate the results after 24-48 hours," he said. "We'll see on Saturday, I did get a knock, now we'll see what the exams say. I can't say for sure what my situation is, I'm not qualified.
"Let's just say I am in doubt for the match. For the moment I will be cured, and today I will only do therapy."
Lazio have started the season well, with Rocchi already scoring twice, so the striker is disappointed to get injured at such a crucial time.
"I'm not pessimistic, I'm just sad I've gotten injured at the wrong moment," he concluded.
Danilo Pochini, Goal.com