Boerrigter won Celtic a penalty against Saints and the Perth side's captain Dave Mackay was sent off.
However, St Johnstone felt there had been no contact between the two players and plan to appeal against the decision.
"I want fair play but I have to see it before I can say anything," said Deila.
"I haven't seen it but as I said yesterday, there will be decisions for and against Celtic and over 38 games the best team will win.
"But I don't like diving. I don't want to cheat."
Celtic won the match 3-0, with Nir Biton converting the penalty that put the reigning Scottish Premiership champions two up.
It was the first league game of the season for Deila's men and they continue their campaign at home to Dundee United on Saturday.
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