Australian captain Pat Cummins has called for a review of the TV umpire review process, stating "there has to be a way to improve it" following three contentious calls from the SCG Test.

The match ended in a draw, mostly due to poor weather and light, meaning Australia would secure a 2-0 series win over South Africa, who endured a difficult summer down under.

Heading into Day 5 of the Test, Australia required 14 wickets before the day's end to claim victory and a series whitewash, however a stubborn Proteas batting order lasted the day despite being forced back to the crease with a follow-on.

The result was frustrating for both parties, with the Aussies likely to have claimed a third victory had it not been for substantial rainfall days prior, while South Africa were again on the back foot after poor efforts from their top order.

Arguably the most frustrating moments for both sides came from overturned reviews from third umpire Richard Kettleborough, with Australian Steve Smith and South African spinner Simon Harmer both involved in separate incidents.

Smith took two chances off the bowling of Josh Hazlewood and Nathan Lyon during the Sydney Test, however had admitted the ball had likely touched the ground in the former.

Harmer's overturned chance came off the edge of Marnus Labuschagne's bat on Day 1 of the Test, with the soft signal again being declared out before Kettleborough reversed the decision.

The trio of incidents all raised eyebrows from pundits and fans, with Cummins declaring more attention into the review process needs to be made.

"I feel for the umpires in that sort of situation," Cummins said, viaย cricket.com.au. "I don't really know the answers but there has to be a way to improve it," said Cummins.

"As it currently stands, it's really hard to give a batter out. If there's any kind of doubt it goes the batter's way.

"With a couple of camera angles really slowed down it's pretty hard โ€ฆ I do feel for 'Ketts' up there. I don't know the answer but there surely there can be some small changes we can make to get a bit more definitive answers.

"I know there are 30-40 cameras here at the ground, it looks like the third umpire only has a couple of those angles available. Maybe there's more of those angles we can use down the track.

"Money to be made for someone with a good idea."

The ICC has recently altered the amount of weight the soft signal holds in reviewed dismissals, despite the governing body's playing conditions stating the initial on-field call should stand if a verdict is inconclusive.