Richarlison was asked for his thoughts on the upcoming tournament in Qatar, which starts on December 11, with Champions League holders Liverpool the overwhelming favourites to return with the trophy.
The Brazilian media are fully focused on the prospect of their top club Flamengo going up against Liverpool in a possible rematch of their 1981 Intercontinental Cup clash in Tokyo, which the Rio side won 3-0.
So, after being put in front of the press in the wake of Brazil's 3-0 friendly win over South Korea on Tuesday, Richarlison was facing questions about that potential match instead.
The ex-Fluminense star refused to say which team he would be cheering for if his former club's Rio rivals overcome River Plate in Lima on Saturday and go up against Everton's enemy from across Stanley Park next month.
He said: "I don't know, I'm their rival there in Liverpool, it's hard, as I also played at Fluminense, I consider myself Flamengo's rival.
"Liverpool are one of the best teams in the world. Whoever wins the Libertadores on Saturday will face a great team - but they are not unbeatable, River and Flamengo have a chance of winning.
"If this is the World Club Cup final, I will not cheer for either - may the best one win."
Richarlison won his 19th cap in Tuesday's win in Abu Dhabi as Brazil snapped a five-game winless streak to ease some of the mounting pressure on head coach Tite.
"The team is to be congratulated," he added. "Now we have to keep working at our clubs, play well over Christmas and New Year to stay in the national team. I really wanted to score a goal today, but unfortunately it didn't come. This victory takes the weight off our backs."