Hazard had a strong penalty claim overlooked against Norwich, as he did last month at QPR.
"The first three penalties he got in the first few games were clear-cut penalties," said Di Matteo.
"But there were a few others where he didn't get them so I wouldn't want the officials to have a prejudice against him. If it's a foul, it's a foul. Sometimes they get them right, sometimes wrong.
"I wouldn't accuse my players of going down too easily. It's a different culture. In England you need to try everything to stay on your feet."