Leicester romped to a 4-0 win against Newcastle on Sunday but the game was a tight battle until James Maddison went down easily in the penalty area and won a spot-kick.
It was the seventh penalty in the Premier League weekend, the most in one matchday since September 2003, and pundit Souness was angered at the soft nature of the decision.
"If we're giving penalties for that we're doomed," he said.
"Maddison actually kicks himself. He gets himself in the air and runs into (Newcastle defender Jamaal) Lascelles."
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