Nelsen said: "I'm just happy when he is on my team in training because he is a pain in the neck to tell the truth.
"He's so bloody good, he's big, he's quick and he's skilful. He has been a great signing.
"He's a really nice guy, he works hard and he's just what a Blackburn player should be.
"I don't want to put extra pressure on him but he's an extremely good player and I'm sure he will prove to be very successful in the Premier League."