He coached Williams for ten years and in those years the tennis legend was able to win numerous grand slams. They were one of the most formidable pairings on the tour and to pay tribute to Williams following her final match, Moruatolgou took to Instagram.
It's a prefered outlet of his where he often shares tennis commentary and tips. The post featured two photos, one from the start of their cooperation and one from the end. He wrote:
"What a ride it has been. Thank you for everything. I wish you the very best for the next chapter!"