Jamie Vardy, Robert Huth, Wilfred Ndidi and Islam Slimani are all one yellow card away from a suspension, concerning Craig Shakespeare.
Craig Shakespeare has urged Leicester City to avoid "stupid" bookings when they face Atletico Madrid in the first leg of their Champions League quarter-final.
Jamie Vardy, Robert Huth, Wilfried Ndidi and Islam Slimani would all miss the return match if they were to collect a yellow card at the Vicente Calderon on Wednesday.
And Shakespeare stated he will be telling his players to be careful not to pick up avoidable bookings when they face the Liga outfit.