Robbie Neilson has claimed referee Greg Aitken got the key decisions right in Hearts' win over St Mirren.
Connor Ronan was shown a straight red card for a tackle on Beni Baningime before the home side had a penalty claim ignored when striker Alex Greive tumbled in the box.
Some of the calls infuriated Neilson's counterpart Stephen Robinson, but the Jambos boss felt the referee had a good game.
Neilson said: "The sending-off made a difference to the game but prior to that I thought we were playing well anyway.
"The ref got the key decisions right. We've seen the tackle on the TV and it's a stonewall red card. It's not malicious but the boy has gone over the top of the ball.
"For the penalty, the player jumps into the challenge and looked for it. I know Stephen will probably see it differently.
"For our second goal, you have to challenge for it. The keeper dives at his feet and they come together but I don't see an issue with that."
Neilson's team eventually took advantage of the extra man as substitute Ellis Simms opened the scoring in the 64th minute before Cammy Devlin netted his first goal for Hearts.
Robinson, confirmed he will watch St Mirren's sending off again to see if it is worth making an appeal.
He said: "The whole game was dictated by decisions today unfortunately. Nothing seems to have changed since I have been away.
"The second goal, Jack is adamant he has the ball in his hands. He is adamant he had the ball under full control. The big lad goes through, follows through and the ball ricochets free.
"I think everybody was surprised not to hear a whistle, including the fourth official, he told me.
"The penalty on Alex, again, for me it looked like a blatant penalty and the boy is on a yellow card.
"The red card in the first half changes the game completely, rightly or wrongly, I have yet to see the decision back but it didn't look like there was too much malice in it.
"He didn't know where the ball was as he turns into the player so that is a real debatable one but unfortunately we have been done by decisions today.
"I will look at the red card obviously to see if it is worth appealing against. In football you can control certain things, you can't control referee's decision making. It's probably best I say no more."
