He’s widely considered the world’s finest tennis player with a string of Grand Slam titles under his belt.

But Roger Federer was like any other father as he doted on his brood on Saturday, pushing his youngest son in a stroller as he took his two sets of twins out in Brisbane.

The 34-year-old cut a low-key figure as he enjoyed a stroll with his children, keeping his face hidden beneath some sunglasses and a hat.

Wearing a white and orange t-shirt, Roger looked ready for the court in some blue sports shorts and sneakers.

He finished his off duty look with a flashy silver watch.

The father-of-four pushed one of his two-year-old sons in his Mamas &Papas stroller and was later seen carrying the other through the street.

His six-year-old twin daughters, Charlene and Myla, held on to each of their brother’s strollers.

The family was joined by a female companion who pushed along the other boy’s pram.

It is not known whether Mirka, the children’s mother and Roger’s wife of six years, was in the city at the time.

Roger is preparing to take part in the Brisbane International, with the former Wimbledon champion among players to participate in the Men’s Singles category.

On Sunday he will be among stars to entertain children at the tournament’s kids’ day.

Federer and his wife welcomed their youngest sons, Lenny and Leo, in 2014. At the time the World Number Three took to Twitter to share the happy news.

‘Mirka and I are so incredibly happy to share that Leo and Lenny were born this evening!’ he said, adding the hashtags ‘twins again’ and ‘miracle’.