Mamelodi Sundowns coach Pitso Mosimane says they played under stress due to the linesman's mistake in the defeat to Kaizer Chiefs.
Samir Nurkovic opened the scoring for the Glamour Boys early in the game in what was a contentious incident, before he sealed the win for the AmaKhosi in the second half.
Chiefs coach Ernst Middendorp was in a conciliatory mood after the game, labelling Mosimane as the "most decorated coach" in the country but 'Jingles' was not amused.
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"Is he sweetening me up? He's one of the luckiest coaches, the goal that they scored is offside!," the Sundowns coach said on SuperSport TV.
"The last person to touch it it's [Leonardo] Castro, it [affects the game], we play under stress because they benefited from the linesman's mistake," he said.
Mosimane was shown the replays of Nurkovic's opening goal on the pitchside monitor but he did not change his stance.
"Do we want to justify how many times Kaizer Chiefs wins with the referees' mistakes? I'll give the benefit of the doubt if we're playing AmaZulu, Golden Arrows or anybody. Against Kaizer Chiefs I give no space. There's no benefit of the doubt to Kaizer Chiefs because they have benefited a lot," he continued.
"If the tactics are not right we can't create all the opportunities we created, if the tactics were not right they could have scored the four goals they scored at FNB Stadium. The tactics were right, we could play until the next day, we don't score. We missed chances, they were lucky we didn't put one inside to change the game.
"We don't have to beat Kaizer Chiefs to win the league, excuse me? I mean there's 23 games left for us, it's okay, we can lose, so what? The team plays well, against Highlands it was a thorn in the flesh, we don't have the legs at the end because they [Kaizer Chiefs] were resting, when we were playing on Wednesday. That's why we don't have a Themba Zwane today. It's OK, we accept, we lost. There's no issue, we keep going.
"Yes, maybe we'll score five like we scored against AmaZulu, so life goes on, I mean even Man City loses, so what? No, let's not make it a big issue, the boys played well, we created the chances and we didn't take them, it's just that it's a derby, it's a big game, ja it's only that.
"But when they benefit, I will say it, they are benefiting from referees' mistakes. I don't know if we're back to the 80's but all I'm saying is Chiefs are benefiting from referees'mistakes. Even if it doesn't look that much of an offside or what, when it's Kaizer Chiefs buckle up!," he added.