"He has had an incredible season in Spain, he's playing here with the same strength, which is why Portugal are in the semi-final".
Group B's Chile began its victorious path to the semi-final stage with 2-0 victory over Cameroon, then finished the match against Germany with 1-1 draw and secured another 1-1 draw against Australia.
Arturo Vidal took the first and converted for Chile.Joao Moutinho lost for Portugal.
The two sides are evenly matched ahead of the semi-final in Kazan, but the individual contributions of Ronaldo and Sanchez will likely be telling at the final whistle.
Here are some of the other players who have been helping Portugal succeed.
"They have a good team, they're aggressive with a fighting, combative spirit, but we are also warriors, we have a great capability to suffer and we don't fear anyone", said Santos. This match is certainly going to be an interesting watch and Portugal coach Fernando Santos said his players are really fired up for the challenge. "We're talking about one of the best goalkeepers in the world, with an extraordinary career, and we're very happy that he's back with us". I think in the semi-final teams will strive to win at the expense of the game in the attack, and not the game on the defensive, so at least a couple of goals scored in the match should be expected without a doubt. He needs team-mates to develop his style and his game.
Chile midfielder Marcelo Diaz, who has often faced Ronaldo with his club Celta Vigo, said yesterday: "We all know he (Ronaldo) is an wonderful player, he's very risky and can decide a game alone. We are not thinking beyond this match".
It is not beyond Vidal to come out against his opponents with strong words and he has proved this a few times in the past. He has had an incredible season.
"We'll try to reduce the spaces he has to move in".
Sanchez was fit enough start versus world champions Germany three days later, and became his country's all-time leading scorer by bagging Chile's goal in a 1-1 draw.
Chile and Bayer Leverkusen midfielder Charles Aranguiz left the game at halftime with an unspecified injury after a hard tackle by Tim Cahill, and Pizzi said he was "in a lot of pain".