Marco Jansen five-for bowls Australia out for 99 as South Africa enforce follow-on

Marco Jansen took five for 33 as Australia were bowled out for 99 on the fourth day of the second Test at St George's Park. South Africa enforced the follow-on with a 326-run lead after declaring their first innings at 425 for nine.

Travis Head remained unbeaten on 87 as Australia reached 156 for four in their second innings at stumps, still trailing by 170 runs. Kagiso Rabada took two wickets and Wiaan Mulder claimed two in the first innings collapse.

Temba Bavuma scored 179 in South Africa's first innings. Steve Smith did not bat in the second innings after suffering a neck injury. South Africa need seven wickets on the final day to level the three-Test series.