With El Nino out for between 10 and 15 days due to a hamstring tear, Keane is set to become the focal point of Liverpool's attack.
Benitez told Liverpoolfc.tv: "When we signed Robbie we were looking for a striker with experience in the Premier League, someone with quality who could score goals.
"That is why we signed him, so hopefully now with him being on fire with the national team this will be an opportunity for him.
"It's important for the players when they go away to play well, and when they score goals it's great for their confidence. It's very good."