Nikky Vuksan says they spoke with both Saints chairman Cortese and manager Pochettino about their plans at St Mary's before deciding on the transfer.
He told tribalfootball.com: "We knew from the first minute we met Mr. Nicola Cortese and Mr. Mauricio Pochettino that Dejan would be welcomed at Southampton with open arms and would blossom there."
Vuksan admits life at Lyon had become unbearable for Lovren.
"From the first minute everyone there has made him feel at home and that is something he desperately needed after the way he was mistreated by the Lyon management and the French press.
"With Mr. Pochettino, who I consider one of the best young coaches in the world, I am absolutely sure Lovren will become on of the top defenders in Europe."
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