A suspiciously looking offside goal by Godfrey Sapula earned Sundowns a two all draw against Ajax Cape Town and caused a major setback to the Urban Warriors' title ambitions.
The game was highly entertaining throughout with both teams playing an attacking brand of football, creating numerous scoring opportunities.
Ajax enjoyed the better of the first half and took a one goal advantage into the half-time break.
The visitors enjoyed the first chance of the game in the 10th minute when defender Serge Dikulu slipped and allowed Clement Mazibuko in on goal, however, the speedy winger's powerful shot smashed into the crossbar and back into play.
In the 12th minute Cyrille Mubiala found the back of the net from a Brett Evans free-kick, but his header was disallowed for off-sides.
Daniel Madau had a chance to put the Pretoria side ahead when he beat the defence in the 25th minute, but his parting shot also hit the woodwork.
Three minutes later Evans released Bradley August up front, but his close-range shot missed the near upright.
Then, just on the stroke of half-time Ajax took the lead when Evans played Anele Zibi through on goal and the latter fired past Downs keeper Andre Arendse from 10 metres out with a well-struck left-footed shot into the roof of the net.
Both team continued to create chances in the second stanza and in the 60th minute substitute Nathan Paulse burst through on goal, but Arendse pulled off a fine save to deny the tall striker, while almost immediately afterwards home keeper Moeneeb Josephs had to be at his best to deny Madau.
In the 64th minute the Brazilians levelled matters when, with his first touch of the game, substitute Lucas Sebona scored after a receiving a square ball from Madau.
However, only three minutes later Ajax were soon back in the lead when Mulekalayi Kanku received the ball inside the 18-yard area and coolly beat two defenders as well as Arendse before tapping the ball into the empty net.
The ecstatic home fans thought they had witnessed the winner, but it was not to be as Sundowns found an equaliser through Godfrey Sapula in the 81st minute.
The initial shot was taken by Sebona and his mis-hit effort fell to Sapula, who tapped in from what appeared to be an off-side position.
The Ajax players certainly felt that the goal should have been disallowed and went over to remonstrate with the assistant referee, but to no avail.
The goal stood, and Ajax were unable to threaten again in the closing minutes, having to settle for a draw which is a major set-back to their league title aspirations.