(ESPNCRICINFO)- CORBIN Bosch’s dream outing continued as he scored his maiden half-century off 46 balls and the highest score by a No.9 batter on debut in Tests as he built South Africa’s 90-run first-innings lead. Pakistan ‘ate’ into most of that in their second innings but lost three wickets and remained two runs behind, leaving South Africa with their noses in front.

The hosts, who need one more Test win to guarantee a place in the World Test Championship final, were at risk of squandering the opportunity to get ahead after collapsing from 178 for 4 to 213 for 8 but a 41-run stand between Bosch and Kagiso Rabada and a 47-run last-wicket partnership between Bosch and Dane Paterson gave them a healthy lead. They did not maximise the advantage immediately and Pakistan’s opening pair of Saim Ayub and Shan Masood put on 49 inside 11 overs before they lost 3 for 25 on a day that ebbed and flowed, more from entertainment than the quality of the cricket.

Both sets of batters will look back in some anger at the way they were dismissed. South Africa’s middle order have questions over some ordinary shot selection while Pakistan, aside from their first innings collapse, now have to deal with signs of variable bounce as they look to build a target they can defend. Amongst those bigger picture narratives, was Bosch’s delight as he ended unbeaten on 81 and was given the new ball in the second innings in a match where he has had a Midas touch.

Bosch came to the crease with South Africa on 191 for 7. Aiden Markram on 87 and Naseem Shah was in the middle of a marathon ten-over spell. Naseem had done the damage either side of lunch after he pulled his length back. That probed a well-set David Bedingham outside off and drew an edge off the back-foot drive to first slip, which sparked a collapse.

Post lunch, Naseem resumed with the same determination. He had Kyle Verreynne caught in the slips off the 14th ball of the second session, playing a loose drive to a ball on fifth stump. Two overs later, he tested Marco Jansen with a tighter line and drew an edge but Ayub put it down at gully. It would not have mattered as Naseem had over-stepped. He did not have to wait too long to rectify his error. His next ball was back of a length and angling away, Jansen edged and was caught behind.