"It is very good (Chiefs' recent form), but it is important for the players to keep their feet on the ground," Khumalo said on SuperSportTV's ExtraTime.
"It is a very long season; it is not a cup competition. So as much as there is joy and there is ease in how they have started, there is still a lot of work to be done. The performance against Stellenbosch was not a great performance, but it was a wonderful result.
"This time [against Polokwane City], the first half was not great, the second half was a lot better.
"So there are signs that something is brewing, so it is important that they remain calm and most importantly, stick together and see it through,” he concluded.