AC Milan playmaker Kaka hopes to be fit to face Arsenal next week after the reoccurrence of a knee problem in Sunday's 2-1 win over Palermo.
The Brazilian came off at halftime as a precaution and was expected to miss Wednesday's match at Catania and next Saturday's clash with Lazio in order to be ready for the Champions League last 16 second leg at San Siro next Tuesday.
However, Kaka is more injured than first thought and could be a doubt for the crucial match, with the scores level at 0-0.
"It hurts a lot," the world player of the year told TeleLombardia on Monday. "I hope to be fit for the Champions league match with Arsenal. I definitely won't be there against Catania."
Kaka was reluctant to wade into the big debate in Italy over recent controversial refereeing decisions but did have one message for the officials.
"Something must be done because at the moment I'm taking lots of whacks, not just me but also the other forwards," he said.