Lazio midfielder Cristian Brocchi admits Napoli's team morale is intimidating.

The two clubs are in a top four battle.

"The thing that frightens us the most is their enthusiasm. The San Paolo will be absolutely packed to the rafters," Brocchi told Lazio Style Radio.

"They'll be eager to beat us because it would be a hugely important result for them and really break away from the chasing pack.

"We must do well and, above all, work with a great deal of confidence in that hostile environment."