Coach Pitso Mosimane was upset with the late penalty for the visitors that decided the game.
However the Brazilians looked tired in the late stages and were happy to see the game out for a draw. That is what probably cost them when they needed to be more positive at home.
The sucker punch leaves Sundowns with four points after three games. They will probably need to win two of their last three games to progress to the quarter-finals.
Here's how Twitter reacted, including a special fan video, supporter's faith that they can turn it around, some teasing remarks and disbelief.
Sundowns must be told that there won't be a back entrance this season— Mulalo (@LaliHoWarD) June 3, 2017
Goodmorning Masandawana This year we are enduring loosing games during last moments of the games. Its costing us a lot. — Mamelodi Sundowns FC (@Sundowns_Fans) June 3, 2017