The pacer took 4-60 as India were bowled out for 307 runs in their first innings, conceding a 28-run lead. The hosts finished at 90/2, leading overall by 118.
"Ive played cricket here all my life, and Ive never seen a wicket like this at the SuperSport Park. It was really hard work. In the heat, with conditions really tough, it was right up there with one of the hardest spells Ive bowled," said Morkel after day three of the second Test.
"But after that, theres actually been no pace in the wicket. Its important to come out with different sorts of game plans. You need to try a lot of things but we had runs on the board in the first innings to try different things. From a bowling point of view, it is definitely not the ideal sort of surface," he added.
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"Theres a very sub-continental feel to it. It is tough to score, and tough to get people out. Luckily weve got some experience of that in the bank. But they are not the conditions that we want here in South Africa."
Talking about the days play, cut short by rain and bad light, Morkel said that a result was very much possible despite the nature of the pitch.
"Luckily by a run out, things changed a little bit. Otherwise I think it would have been an interesting sort of day. And then with the bat this afternoon, I thought Dean (Elgar) and AB played superbly after losing those two early wickets.
"It was tough, with Ashwin bowling from one end and they had the luxury of rotating their seamers from the top. But the way they stuck out, to have the lead by over 100 tonight is satisfying," said Morkel.
"I think definitely a result is very much possible. If they get some early wickets tomorrow, or if we can bat through the first session while not losing many wickets, the game will still be very open.
"Off the top of my head, I think maybe 250 on Day 5 will be a safe target. With the wicket now turning a little bit and keeping a little bit low, I think 250 can be a very good score, he added.
"Virat is very competitive. They are over here to compete and theyve got a team that could potentially beat South Africa for the first time here. Thats his nature.
"It gets him going and keeps him going. Were well aware of that but we dont take any notice of it. And if you get a batsman of his quality, youve got time to adjust.
"Bowling certain lengths, certain lines, weve got that small window to make a play. To keep him quiet on this sort of surface, we have to bowl as many dot balls as possible," Morkel said.
"Talking about collapses (in the second innings) is a bit of a red flag but its something that we do talk about - losing a cluster of wickets is not ideal.
"Individuals must take responsibility, but theres a massive thing in the team to build partnerships. Hopefully tomorrow we can get that lead that we want," he signed off.