The Italian has found the net just once since signing for the Premier League outfit from Roma, but believes it is only a matter of time before his strike rate improves.
"I know I have been bought to score goals but I don't feel the pressure. I know it will come," The Mirror quotes the forward as saying. "It's just a matter of time for me.
"The same thing happened last season - I scored one goal for Roma before October, then got injured for three months. After that, I scored my second goal in January and from then until March I got 10.
"At Swansea, I got six between March and April (over the course of seven games on loan from Chelsea), so I know from past experience that the goals will come."
Liverpool are in Europa League action tomorrow evening when they take on Italian side Udinese at Anfield.