He would not comment on the types of clients the firm caters to, but it reportedly has a contract with Mubadala, a state-owned investment firm in Abu Dhabi.
Mubadala Development, an Adu Dhabi company, owns five percent of the Ferrari team, while the government-owned Bahrain Mumtalakat Holding acquired a 30 percent stake in McLaren last year.
Goldman and MSD Capital bought 7.5% equity stakes in Related, while an affiliate of Abu Dhabi's Mubadala Development the Olayan Group and an unnamed company made debt investments of an unspecified amount.
"I did not expect this story was going to get so much attention, and everywhere in the world too, " he told the Gulf News ahead of his first match at the Mubadala World Tennis Championship.