The two sides meet at New Inn, with throw in at 7:30.
The winner of that clash will go on to face Loughmore-Castleiney in the last eight.
Speaking to Tipp FM, Arravale Rovers Assistant Manager Tadhg Duggan says that he's expecting a tough battle from Cahir, but that things are good in their camp.
We'll be keeping you updated on that game duringTipp Talk Sport and Shades of Green this evening from 7:30.
