The 28-year-old is in his third season with "Helgonen" which he joined on loan in 2018.
A year later, in the summer of 2019, Southampton put up the equivalent of SEK 250 million for the striker and bought him out of Liverpool.
The money has been well invested.
An Ings in form is given in Southampton.
In tonight's only match in the Premier League, he struck already after two minutes, with a lob that slammed over Alisson Becker.
Out of respect for her previous employer, Ings chose to celebrate the goal moderately at home on St. Mary's.
The teammates were all the happier.
Southampton had some clear chances before the break to extend the lead against a surprisingly tame and oblivious Liverpool.
The reigning champion club's promotion came in the second half, but it did not keep the quality required to give points, against a well-organized home team.
Southampton manager Ralph Hasenhüttl was so taken by the success that he went down on his knees after the final whistle.
And judging by the TV pictures, there were also the occasional tears from the eyes.
Liverpool are now up in three games without a victory in the league, but are still at the top due to a better goal difference than Manchester United, who have played one game less.
Southampton are sixth on 29 points, four fewer than Liverpool and United.