Pakistan took four early South African wickets to dominate the second Test in Rawalpindi on Friday, despite a five-wicket haul by touring fast bowler Anrich Nortje.
South Africa were in trouble at 106-4 after the second day's play on a tricky Rawalpindi stadium pitch, trailing Pakistan's first innings total of 272 by 166 runs.
At close, South African skipper Quinton de Kock was on a breezy 24 with five boundaries and Temba Bavuma -- surviving two close appeals -- was unbeaten on 15 after Pakistan's medium pacer Hasan Ali took two wickets off two balls.
Earlier, Nortje grabbed his third five wicket haul with 5-56 to restrict Pakistan's total. Keshav Maharaj finished with 3-90.
Despite South Africa's controlled bowling, allrounder Ashraf played a knock of 78 not out studded with 12 hits to the boundary -- his fourth Test half century.
Pakistan lead the two-match series 1-0.
