Sinisa Mihajlovic believes Catania can end AC Milan's title hopes today.
Catania have put together some remarkable results over the past few months, beating the likes of Inter, Juventus and Palermo.
"The fact we are nicknamed the giant-killers highlights our strong mentality," said Mihajlovic.
"We try to beat everyone, so even if it is a difficult task in Milan, our fighting spirit remains the same.
"The great thing is we know that we have what it takes to hurt them at any moment. It will be a fantastic game."
Milan are still in the Scudetto race, but failure to beat Catania this weekend would effectively end their hopes.
"Could they lose the title because of Catania? That is not our concern. Catania focus only on ourselves and will put the usual grit on to the field," added Mihajlovic.