Tom Brady's Super Bowl triumph with the Tampa Bay Buccaneers was watched by a disbelieving audience, giving him something in common with US president Joe Biden.

Brady and the Bucs visited the White House on Tuesday in honour of their Super Bowl LV win over the Kansas City Chiefs, the former New England Patriots quarterback winning a scarcely fathomable seventh Lombardi Trophy at the age of 43.

And he humorously compared that success to president Biden's win in last November's presidential election, which continues to be disputed by former president Donald Trump and his supporters despite no evidence to support claims of election fraud.

"Not a lot of people think we could've won," said Brady in his speech. "In fact, I think about 40 per cent of the people still don't think we won."

"I understand that," president Biden replied. 

Making a pointed reference to the build-up to the election in which then-president Trump and the Republicans frequently referred to president Biden as "sleepy Joe", Brady added: "We had a game in Chicago where I forgot what down it was.

"I lost track of one down in 21 years of playing and they started calling me... Sleepy Tom. Why would they do that to me?!"

Tampa Bay begin their title defence against the Dallas Cowboys on September 9, and it is safe to say nobody will be sleeping on the Buccaneers' chances of retaining the crown.