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The Dutchman jumped to the ground in the penalty area despite no contact being made by his opponent, resulting in a spot-kick that Daniele De Rossi duly slotted home.
Lazio would go on to win the game, however, with goals from Keita Balde Diao and Dusan Basta helping to secure a 3-1 win overall.
Strootman has been retrospectively punished for the dive, however, and will now miss crucial games against AC Milan and Juventus, pending an appeal.
You can watch a clip of the incident in the video above and for more on diving, check out this week’s SMH!