Contact was made when the Nigerian went down but referee Mark Clattenburg waved away the appeals from the Foxes.
Fans quickly took to Twitter to express their frustrations following the controversial call.
The penalty could have made the difference at King Power.
But ultimately the Gunners picked up their first Premier League point of the season as the match ended 0-0.
Check out our gallery above and decide whether or not Clattenburg was right.