“Messi is an idol for many people, a player of great quality who has managed to be crowned the best player in the world four times,” Willian told reporters.
“I like to watch him play, of course. He is someone who, when Argentina play, he has many people stop to see him at work.
“Undoubtedly, it is always great to play for Brazil against Argentina, and if it happens it will be really cool. Everyone dreams of playing against Argentina. We are getting ready for the possibility of that happening, but we must not get ahead of ourselves.”
The 26-year-old admits that Paraguay could cause Brazil significant problems, having beaten the Samba Boys on penalties at the same stage of the Copa America four years ago.
“Paraguay are competitive opponents and it will be a fight for the full 90 minutes. But as a national team we know well how to play against these sides,” he added.
“In the last Copa America we were eliminated by Paraguay, but I hope it can be different this time. Hopefully we can play the game the way we like, with joy and responsibility and can eliminate a tricky opponent.”
Brazil will have to play the rest of the tournament without captain Neymar, who has flown home after receiving a four-match suspension for his behaviour during and after the 1-0 group stage defeat to Colombia. But Willian insists the rest of the squad have what it takes to get on with the job.
“There isn’t really any difference in our manner. With or without Neymar, I will try to play my best football.
“Our total focus is on Paraguay. We just have to be focused and attentive in what we do. We will watch videos, get information and hopefully play a great game.”
Brazil star Willian says that Argentina’s Lionel Messi is an incomparable player whom everybody enjoys watching.
The Selecao face Paraguay in the Copa America quarter-finals on Saturday knowing that the reward for winning could be a last-four encounter with Messi and Argentina.
And the Chelsea attacker says it is a prospect he looks forward to with relish, especially since he will get to see the Barcelona superstar at close quarters.