Millions of Americans are expected to tune in Sunday for the championship game in American football, the Super Bowl, which is one of the most-watched programmes of the year.

If viewership of previous Super Bowls is any gauge, more than 100 million Americans - about one-third of the people in the country - will watch the game on television. Millions more will watch internationally and another large audience is expected to stream the game over the internet.

The New England Patriots, led by coach Bill Belichick and quarterback Tom Brady, face the youthful and talented Los Angeles Rams at Mercedes-Benz Stadium in Atlanta. Kick-off is set for 6:30 pm (2330 GMT).

A win for the Rams would be their second. The team were Super Bowl champions in 2000 when the Rams played in St Louis. They made two other Super Bowl appearances, both losing efforts, including a 2002 loss to the Patriots.

That game was Brady's first Super Bowl and the first of five championships the 41-year-old has helped the team based outside Boston win. They are favoured Sunday by about 2 points, according to gambling websites, which estimate 6 billion dollars will be wagered on the game by about 22 million Americans.

The game will include a half-time show performed by Maroon 5 and rappers Big Boi and Travis Scott and numerous commercials competing for the massive audience's attention.

Game day also will feature an interview with President Donald Trump that will be broadcast on CBS, the network airing the game, on Sunday morning.