They are still holding on the 4th spot with 59 points and 34 matches while United on 5th spot with 55 points and 33 matches. If Manchester United win their next game which I hope they will , Leicester will still be getting that 4th spot.
on round 38, Leicester will be playing against Manchester United. If both team keep on winning their game until the last match then whoever wins the final game will have the luxury on that 4th spot
Provided that Leicester can maintain it, he will continue to occupy the position of 4 even 3 three again because Chelsea will face Liverpool so that is also an opportunity for Leicester.
Maybe at the end of this season the toughest opponents to face are Tottenham and Manchester United if both of them are able to pass then I think they can occupy position 3 again.
Arsenal lost the player in the 75th minute but Leicester could not make use of it with time left.