Koeman’s side are five unbeaten in the Barclays Premier League and could climb into the top-six with a win in Wales tomorrow.
But they will face a Swans team that haven’t lost in their previous four, with new manager Francesco Guidolin having been in charge for the last three of those.
"We expect a difficult game, because I think they also have four or five games in a row without any defeat and the new manager brings in detail some changes in the team and changes in the system,” Koeman told youtube.com/southamptonfc
“That's always difficult to know what you can expect. But, ok, we analyse Swansea in the last few weeks and we are well prepared.
"We had a good win there last year. I think there was a red card for [Wilfried} Bony that time. We had a good win, and a good goal of Victor Wanyama.
“We know what we can expect. It's always difficult to beat them at home, but ok the confidence is in the team, we are playing well, we are defending well and we are looking forward to this Saturday.”