New Delhi, March 2 -- Former India spinner and head coach Anil Kumble believes the variety offered by South Africa's pace trio, featuring Marco Jansen, Kagiso Rabada, and Lungi Ngidi, makes them a dominant force even in the non-friendly bowling conditions evident in the ongoing Champions Trophy.

On Saturday, the unbeaten South African side sunk England to stay at the top of Group B and storm into the semi-finals. The Proteas kicked off their campaign with an emphatic 107-run victory over Afghanistan.

Rain washed away their second fixture, but they went on to cap off their group stage campaign with a 7-wicket triumph over the Three Lions.

South Africa forced England to bundle out on 179 and Afghanistan on 208, the two lowest totals in t...