Cricket Australia chief executive says he is open to the idea of trialing four-day Test matches in a push to boost waning popularity of Test cricket.
The International Cricket Council approved the experimental concept last year as South Africa played Zimbabwe in the inaugural four-day Test last December in Port Elizabeth, winning inside two days. A minimum 98 overs had to be bowled each day, as opposed to the regulation 90 in a five-day game.
The next four-day Test is scheduled in July next year when England host Ireland at Lord’s.
"There's a bit to be said for it," Roberts told radio station SEN Saturday.
"It's certainly something we need to be open minded to down the track."
He pointed out that the average duration of a Test match "is a shade over four days".
"We know there's been timeless Tests over the years, we know there were even three-day Tests. So Test cricket hasn't been five days in duration forever," he said.
"And I think the concept of four days going forward is something we need to be open to, without jumping to conclusions."
Former England captain Michael Vaughan has been a long-time advocate of shorter matches.
"Test match cricket has been on the decline for many years, that's been a worldwide problem, although not particularly in the UK, but give it a try and see how it goes," he said earlier this year.
"People said day-night Tests would be ridiculous, that they would finish in two days, but they've been a great spectacle and worked in the right parts of the world."
Australia have also been at the forefront of playing Test matches under lights, hailing them as a great success.