The 37-year-old will put his WBA, IBF and WBO titles on the line against the undefeated Italian, but despite entering the bout as a heavy favourite, the Ukrainian fighter has insisted that he will not take the 28-year-old lightly.
Klitschko told a press conference: "I don't want to and I won't underestimate Francesco Pianeta. I have prepared how I should, because I know what to expect.
"He's a young chap who, of course, doesn't know his limits. They have to be shown to him in the ring."
Victory on Saturday would be Klitschko's 60th in 63 professional fights.