Striker Slimani, who cost £29million from Sporting Lisbon last month, marked his Premier League debut with a brace in Saturday's 3-0 win.
"It's good for Slimani and good for everyone. It was a very good performance from him, as well as his team-mates," he said.
"He linked very well with (Jamie) Vardy and the others and he pressed so hard during all the match. We bought him for these characteristics.
"Riyad made two fantastic performances, in Bruges and here, and I'm very pleased when he plays in this tactical way because he was very clever, when to attack, defend and play in between the lines.
"Of course he's happy with Slimani here - he's happy with everybody."