On Sunday night, Buatsi ensured that he would leave Rio de Janeiro with at least a bronze medal with a dominant win over fourth seed Abdelhafid Benchabla, and the light-heavyweight has revealed that Mayweather Jr had some kind words for him after his win over the Algerian.
The 23-year-old told BBC Sport: "He said to me he had heard about me before I got here and that I was a great fighter, a future world champion.
"It was good to hear that from someone like Mayweather, who I think is the greatest boxer of our generation.
"I want to dominate in every way I can, and I want more than bronze. I will give it everything that I've got to make sure I get a gold."
Buatsi will attempt to reach the gold-medal match when he faces Kazakhstan's Adilbek Niyazymbetov on Tuesday night.