"We thought it was going to turn, and not really nip, but with the new ball, there was a bit of movement," Rabada said after the day's play. "Not really much swing, but off the wicket, there was quite a bit of seam movement.

"To be fair, that's actually how it played in the nets. Generally, what you get in the nets is what you'll get similarly in the middle. It's turning for the spinners and seaming for the seamers too. We found that quite surprising. We don't prepare the pitches, but that's what was prepared, and it's as simple as that."

Before he bowled a ball, however, Rabada was worried about how South Africa were going to force the issue, having been asked to bowl first at the Shere Bangla National Stadium, a ground with a reputation of producing raging turners. But between them, Mulder and Rabada had the home side at 45 for 5 in the 20th over.

When Mushfiqur Rahim became the fourth batter to fall, Rabada had his landmark wicket. And it was a special delivery that did it, swinging enough and nipping in slightly to take out both the off and middle stumps.

"When I came on to bowl this morning, I wasn't really thinking about that final wicket," Rabada said. "I was more focused on how we were going to win this Test, especially after losing the toss and bowling first. But when it happened, it was just a relief. Everyone plays for milestones, but it was a relief. The way my team-mates support me, we support each other, and that felt really good.

"It's a special moment. As for the record, I didn't know about it, but I guess it motivates me to do even better."

The early damage, however, had been done by Mulder, who picked up the first three wickets to leave Bangladesh at 21 for 3.

"He bowled unbelievably. He's looked good ever since our camp back in South Africa. Credit to him - he's worked really hard, and it shows," Rabada said. "He didn't really have to adjust much because he's been bowling like this since the camp. I'm not surprised by the reward he got this morning. He was phenomenal, and I'm really happy for him."

South Africa, responding to Bangladesh's 106 all out, ended the day on 140 for 6, with Taijul Islam picking up five wickets. So spin after seam. To the inevitable question about whether this type of pitch was good for Test cricket, Rabada smiled before choosing the diplomatic route.

"I think there needs to be a balance in Test cricket. You want a fair contest between bat and ball. That's the type of wicket you want," he said. "You could argue that a bowling unit hasn't bowled well or a batting unit hasn't performed, and that's the balance you're always trying to weigh.

"But with 16 wickets on day one, I'd say it's leaning towards the bowlers. Test cricket should offer a fair contest between bat and ball, where bowlers get something if they bowl well, and batters can score if they apply themselves."