Former Southampton striker Gordon Watson believes the club must sign three players in January.
The Saints are in danger of relegation this season, having won just once in twelve games.
Watson said: "I know the chairman keeps saying there are no plans to purchase but it's going to be a horrible season unless we do something about it.
"I don't think they'll go down, they're a little too streetwise for some of the other teams.
"But what we're watching is not good enough and we've got a chance to do something in the January transfer window."