Kane revealed after the match at Wembley Stadium that he is desperate to continue scoring at his current rate, but Cahill has sounded a note of caution as he believes that it will be dangerous to over-rely on one player.
"He's been fantastic for us, but you don't to go into a tournament with everything on Harry Kane," he told reporters. "We want him to be in fantastic form, but we want everyone to contribute. Going into the tournament, we want everyone to have the kind of confidence he's showing at the minute.
"The fearless mentality. That's the way he is at the minute. At this moment in time I see him being one of the best in the world in terms of form. He's at a fantastic age and his finishing is unbelievable.
"He must be gushing with confidence. He must feel like he's going to score every time he takes the pitch. Not even one [goal], it's like, 'How many am I going to get today?!' He must have that kind of mentality."