The left-back was replaced in the 37th minute at Turf Moor.
According to Slot, the decision was made because Kerzez had received a yellow card for diving, which he felt could lead to a second yellow card and a red card if the player made another mistake.
Slot was concerned that if Kerzez committed another foul, the crowd might influence the referee's decision, potentially leading to a penalty for Burnley.
Slot stated that he wanted to avoid having to play with 10 men, which he believed would have increased the risk of Liverpool losing the game.