Five-time champions Brazil and Cristiano Ronaldo's Portugal joined France in the World Cup knockout rounds with a game to spare on a dramatic day of action in Qatar.

Manchester United playmaker Bruno Fernandes starred for Portugal, which they won 2-0, scoring with a shot early in the second half before converting an injury-time penalty.

Ronaldo wheeled away in celebration after the first goal but FIFA decided he had not touched the ball, denying him a ninth World Cup goal, which would have put him level with Portuguese great Eusebio.

"It was a well-deserved victory," Portugal coach Fernando Santos said. "The first part is over, we are in a hurry. Now I will continue to work to improve what needs to improve."

Portugal topped Group H with six points after two matches, three ahead of Ghana, who edged a five-goal thriller against Son Heung-min's South Korea.

Man-of-the-match Mohammed Kudus, 22, one of the hottest properties in world football, caught the eye with two goals including the winner midway through the second half.

READ MORE: Germany save the day against Spain in World Cup draw

Casemiro strike

Portugal booked their place in the knockout phase in Qatar hours after Brazil progressed, courtesy of a late goal from Manchester United midfielder Casemiro.

The Brazilians, missing the craft of their injured talisman Neymar, looked as though they would have to settle for a point after a Vinicius Junior strike in the second half was disallowed for offside.

"The first aim was to qualify. That was really important in a group as difficult as ours," the 30-year-old Casemiro told Brazilian broadcaster SporTV.

Tite's Brazil kicked off their campaign in Qatar with a 2-0 victory over Serbia but Paris Saint-Germain forward Neymar limped off with an ankle injury.

Rigobert Song's team looked almost dead and buried after goals from Strahinja Pavlovic, Sergej Milinkovic-Savic and Aleksandar Mitrovic gave Serbia a two-goal cushion early in the second half.

But substitute Vincent Aboubakar and Eric Maxim Choupo-Moting snatched a draw with two quick-fire strikes just after the hour mark.

Switzerland have three points ahead of their final group game against Serbia, who are level on one point with Cameroon.