Simpson joined the Foxes this season from QPR.
De Laet told lcfc.com: "Maybe the last year or two years we didn't really have another out and out right back. Now we've got Danny Simpson, who has come in with a lot of Premier League experience and he keeps me on my toes and sharp in training. I just have to keep taking that into games.
"When I first came onto the scene at Antwerp he was on loan there from Manchester United. Then when I went to Manchester United I was with him for maybe half a season before he moved on to play regular first team football for Newcastle and Queens Park Rangers, which really helped his career."
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