Pakistan, Oct. 21 -- Marco Jansen claimed five wickets as Australia collapsed for 99 runs against South Africa on Wednesday. South Africa had declared their first innings at 425-9 on day four of the second Test at St George's Park. With a 326-run lead, the hosts enforced the follow-on despite Anrich Nortje missing out with a groin injury.

Jansen struck immediately, dismissing nightwatchman Scott Boland with his first delivery of the innings. The left-arm fast bowler then removed Travis Head, Matt Renshaw, Alex Carey and Beau Webster. His spell left Australia struggling as the visitors failed to build a meaningful response to South Africa's total.

Steve Smith top-scored for Australia with 28 runs despite needing treatment twice for what ...