The Foxes lead Group G with six points from two games and are now in pole position to qualify for the knockout stages in their first venture into the competition.
Fellow Algerian Riyad Mahrez supplied the pass for Slimani and said: “Islam is always ready in the box. I just put the ball in and he was there.
“We have six points from six and the next game is at home and we need the points too, as it is always more difficult at home.”
Tottenham were also victorious last night, winning their first Champions League game this season at CSKA Moscow.
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