Aussie swimmers Cate and Bronte Campbell are set to take the Rio Olympics by storm.

The sisters will likely go in joint-favourites to win gold in the 100-metre freestyle.

‘That’s an extraordinary situation,’ 3AW Breakfast’s sports guru Jon Anderson said.

And it got Ando thinking.

Which sibling sports duo is the best of all-time?

Cricketers Steve and Mark Waugh, soccer players Gary and Phil Neville and NFL quarterbacks Peyton and Eli Manning all rated a mention.

But the best of all-time?

‘Serena and Venus Williams,’ Ando revealed.

‘And by a fair way.’

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