Belgium will face five-time champions Brazil in the World Cup quarter-finals in Kazan on Friday.

"Tomorrow we'll be really put to the test as a team, because we are going to play against the best team of the tournament," Lukaku said.

When asked whether he considered the upcoming match against Brazil the most important match of their life, the 25-year-old forward said this was not the case.

"If we're going to win tomorrow's match, the match after that will be even more important... But we're going to try to win, obviously,"  the Manchester United forward said.

The 2018 FIFA World Cup kicked off on June 14 and will continue until July 15, with the matches being played in 11 cities across Russia.