The Serie A side lost 2-1 to West Ham on Sunday and have also lost 4-0 to Borussia Dortmund this summer.
He said: “The Super Cup is coming up and we can win next week’s friendlies to gain some self-belief ahead of the Nerazzurri challenge.
“It didn’t go well on Sunday, but there are many other games to play and I can guarantee that we will improve.”
He added: “In England it is always like that. They play more aggressively, but I like that style of play because the duels are more intense.”