Forlan told 'BBC Radio 5 live': ''Ronaldo is a leader, the way he scores the goals and how important they are. He is a great player but I am confident with our defence and how the team are doing.''
''I am not worried defensively but we have to be careful, we have to be more concentrated than other games. We respect everybody, it is not like we change because it is Portugal.''
Forlan was asked if the Portuguese star would be targeting the Golden Boot, and he said: ''Ronaldo's way of living is that he likes challenges. He has achieved so many things so maybe it is OK for him to be like that.''
''We have seen a different Ronaldo, he is more of a team player, he finishes and scores but others in the team do too. You do not see him shooting from all angles to get goals, this is why he is one of the best players in the world.''
The Uruguayan added: ''He knows that if he does not play well and the other team-mates don't score, he will be out of the competition.''