India captain Rohit Sharma was left frustrated by his team's erratic fielding after Sunday's five-wicket defeat to South Africa.

Aiden Markram's 52 and David Miller's unbeaten 59 guided the Proteas to victory at Perth Stadium in a thrilling, but low-scoring, T20 World Cup clash.

South Africa's bowling attack – spearheaded by pace duo Wayne Parnell (3-15) and Lungi Ngidi (4-29) – reduced India to 133-9 in their 20 overs, with Suryakumar Yadav (68) the only batsman to offer any firm resistance.

Yet India had hope when Quinton de Kock, Rilee Rossouw and Temba Bavuma all fell in the first six overs of South Africa's chase. Miller and Markram subsequently steadied the ship for the Proteas, yet the latter was fortunate.

Rohit and Suryakumar both missed run-out attempts, while Markram was dropped by Kohli in the deep. Indeed, he brought up his half-century with a sliced shot that landed between two fielders on the boundary.

It was a collective effort that disappointed Rohit, who said: "I thought we fought well until the end, but South Africa played well. The pitch is such that the wicket can come any time for the seamers. It was a match-winning partnership from Miller and Markram.

"But we were not good enough on the field. We have played in such conditions, so conditions are not an excuse. We want to be consistent in that department.

"We could not hold on to our chances, we missed a few run-outs, including myself."

The victory moved South Africa top of Group 2, with the Proteas having taken five points from their opening three matches.

However, while Markram and Miller starred with the bat and Parnell and Ngidi were brilliant with the ball, it was another tough day for captain Bavuma, who scored only 10 before edging Mohammed Shami to Dinesh Karthik.

Bavuma has struggled for form in T20Is this year, with Sunday's short-lived knock only the third time he has reached double figures from 10 innings.

Former Proteas captain Markram, however, had words of support for his skipper.

"I think every player goes through these sort of form slumps," Markram said in a press conference when asked about Bavuma's struggles. "With games that are so close to each other, it can seem a lot worse than what it is.

"I think the whole team, management involved, have been there for Temba and our ideas don't change about his ability. We all know his ability and our team and the role that he plays, not just from batting, but also from a leadership point of view as well.

"His leadership in my opinion has been excellent. On-field decisions have been really good that he's making. So I've got no doubt he'll come right with the bat. If he does, and we can get off to some good starts, I think it's going to help our batting unit a lot, but certainly not doubting his ability at all.

"I think the whole team, and I can speak on behalf of the team, we all support him. It happens to everyone. We've all been through it. I've been through it more than once, unfortunately. It's always just one knock away, and that's sort of the message that Temba has been given for the time being."