Ndamulelo Radzilani got the goal in the 22nd minute when he headed in a cross from the left at Bambolin Stadium on Friday.
Molefi Ntseki's charges next face China on Sunday at the same venue. Kick-off is at 20h00 (16h30 SA time).
China lost 4-1 to Russia in their previous outing.
The Russians also defeated India 1-0 in the tournament opener on Wednesday.
SA team vs India:
Glen Baadjies, Mswati Mavuso, Luke Fleurs, Nkanyiso Shinga, Mjabulise Mkhize, Sabelo Radebe, Ndamolelo Radzilani, Luke Le Roux (C), S’miso Bophela, Lyle Foster, Thabo Mokwena.
Subs: Tshepo Mohui (GK), Rhuwano Wynne (GK), Sechaba Mokoena, Jaqueel de Jager, Lethabo Mazibuko, Tyrees Pillay, Kabelo Makola, Mpho Mahlangu, Sifundo Nkosi, Sithembiso Kurata.
BRICS U-17 FOOTBALL CUP RESULTS:
Round Robin Stage – Bambolin Ground
Wednesday, 5 October
China 0 – 2 Brazil
Russia 1 – 0 India
Friday, 7 October
China 1 – 4 Russia
South Africa 1 – 0 India
Sunday, 9 October
Brazil vs Russia, 16h00
South Africa vs China, 20h00 (16h30 SA Time)
Tuesday, 11 October
India vs China, 16h00
Brazil vs South Africa, 20h00 (16h30 SA Time)
Thursday, 13 October
Russia vs South Africa, 16h00 (12h30 SA Time)
India vs Brazil, 20h00
3rd 4th Place Play Off – PJN Stadium Fatorda
Saturday, 15 October
Group 3rd Place vs Group 4th Place, 10h00 (06h30 SA Time)
FINAL – PJN Stadium Fatorda
Saturday, 15 October
Group Winner vs Group Runner Up, 15h30 (12h00 SA Time)