Benali is looking forward to tracking the progress of new manager Koeman, who has the 45 year-old's backing to be a success at St Mary's.
"He was an amazing player wasn't he? He's a huge name to attract to Southampton," said the former full-back to the Saints YouTube channel.
"I'm hopeful and excited like everybody else is associated with Saints, that it will be a successful season for both him and the club and I think with his experience and his knowledge, and his background, he'll be a massive asset and bring success to the club."
For the big stories and the banter follow us on Twitter: @tribalfootball