"When I got to SuperSport he was one of the youngsters that I talked to because I saw potential. The most important thing about him is that when he was given an opportunity, he used it," Letsholonyane told The Sowetan.
"I am hopeful he will be a great player in the country in the coming years," he said.
Following his debut, Mokoena went to achieve three man of the match awards for Matsatsantsa, and he recently earned a call-up to the senior national team, Bafana Bafana.
His performances have caught the eye of many, and Yeye hopes he can remain level-headed as a professional.
"Talent alone is not enough. He must remain as humble as he is because even if you have potential, you might end up not fulfilling it if you have a bad mindset and wrong attitude. I told him that he must keep on working hard and remain grounded," Letsholonyane said.