Ribeiro notched his 11th league goal of a first season at Sundowns after joining the Pretoria club in mid-2023 from Belgian outfit SK Beveren.
The goal at a cold and wet Athlone Stadium put the 25-year-old South American one ahead of Tshegofatso Mabasa of Orlando Pirates in the Golden Boot race.
Victory lifted Sundowns 13 points ahead of second-placed Stellenbosch with two matches in hand as they chase a record-extending seventh straight league title.
CAF Champions League semi-finalists Sundowns need four victories from 10 fixtures to win the Premiership a 13th time.
The leaders also became the first club to collect 52 points after 20 rounds — beating their record of 50 points last season.
Spurs have 12 points with seven matches to play, five less than Richards Bay. The bottom club are automatically relegated and the side finishing second last enter play-offs.
© Agence France-Presse
Photo: twitter @iDiskiTimes