Italy international Fede Chiesa scored the opening goal at Marassi, while Aaron Ramsey turned in the Juan Cuadrado counter in stoppages.
“Chiesa is a young player who joined a big club, facing international matches for the first time, and it was a big step up for him, so he was a little shy at first. He's settled now, gained in confidence and has improved a great deal," Pirlo told Sky Sport Italia.
“It's good that he is finishing off the moves that we attack, and he ought to do it more often, making the most of his runs from deep."
He continued: “It's a pity we didn't kill off the game in the first half, as we had the chances to double our lead. It's only normal with a one-goal gap that Sampdoria would push harder, but Wojciech Szczesny didn't make any particularly difficult saves. We got the second goal eventually, although we should've done it earlier."
“Ronaldo gave his contribution again today with his passes for both goals, so the important thing is that the team wins."