The Brazilians conceded two quick goals and were reduced to 10 men on their way to a 5-0 mauling on their home turf.
The shock reversal means Kaizer Chiefs could be crowned Premier Soccer League champions onWednesday next week if they beat Polokwane City.
The loss for Sundowns means they can only finish on a maximum of 62 points. Chiefs, after winning away at University of Pretoria on Tuesday night, are already on 60.
Ramahlwe Mphahlele’s stray pass was intercepted by Celtic’s Frank Mhango inside 40 seconds. He then set up Musa Nyatama.
A square ball in was parried by Dennis Onyango but allowed Lerato Lamola to grab his 11th goal of the season, and take the lead in the top-scorer stakes.
Keagan Buchanan set up a second for Celtic in the ninth minute when he placed the ball behind Alje Schut and allowed Mhango to take it past Onyango, turned and put it into an empty net.
Then Onyango took down Lamola outside his penalty area as he rushed out to stop another counter-attack, getting a deserved red card.
Down to 10 men, Sundowns sacrificed Themba Zwane to bring on goalie Kennedy Mweene to play the final 65 minutes.
Thapelo Morena hit home from the right side a fine square pass from Keegan Ritchie in the 49th minute to make it 3-0.
Musa Nyatama struck home in the 54th minute, followed straight after by the fifth goal of the night from Mhango, who delivered a superb header from close range.
- Platinum Stars made heavy weather of a winnable game against Supersport United last night at Royal Bafokeng Stadium, Rustenburg, only managing a goalless draw, reports Mazola Molefe.
- Khanyiso Tshwaku reports from Princess Magogo Stadium, Durban, that AmaZulu bloodied Polokwane City’s nose with a 2-0 win last night.
Goals from Goodman Dlamini (30th minute) and Bongi Ntuli (84th minute) ensured that Usuthu climb out of the relegation zone.
- Chippa United beat Moroka Swallows 1-0 at Nelson Mandela Bay Stadium, Port Elizabeth, last night, writes Vuyokazi Nkanjeni.
Edward Manqele’s strike in the 26th minute ended the Chilli Boys’ 12-match winless streak.