Higuain struck in the 2-0 win.
“It's never easy to win here," the striker told Sky Sport Italia.
“We didn't have a brilliant game, but we didn't concede either. We won and I think it's a big step towards the Scudetto.
“Did I expect Bernardeschi's goal? Yes, and I'm very happy for him."
Asked about his goal by Premium Sport, he replied: “It's always important, I'm always calm."