The tough-tackling midfielder joined the Brazilians on a four-year deal yesterday.
Some suggested that Sundowns beat Pirates to the punch, but Sukazi says there were no official bids from the Buccaneers.
“I have heard the rumours about Orlando Pirates having an interest in Mbekile,” he tells KickOff.com.
“I am not too certain as to how true or untrue those rumours are, but be that as it may, we could only deal with the club that formally engaged us and that club was Mamelodi Sundowns.”
Sukazi adds: “I am happy for Sundowns as I believe they have signed a very good player. This is one player who will surprise many football pundits.”