Saints are reportedly willing to sell midfielder Mario Lemina in the summer transfer window.
Hasenhuttl has to sell a number of players to raise funds and buy the players he wants.
Those players are thought to include Charlie Austin, Sam Gallagher and Matt Targett - all players who are currently being rumoured to be in later stages of being sold.
Meanwhile, high earners such as Fraser Forster, Wesley Hoedt and Cedric Soares are all thought to be among those who Hasenhuttl wants sold.
Lemina was once a record signing for Southampton after signing from Juventus for a fee of around £15m back in 2017.
The Gabon international endured an injury-ravaged 2018/19 Premier League campaign and it seems Hasenhuttl is willing to let the midfielder leave for a suitable transfer fee.