Charlie Austin came off the bench to grab a winner on his Southampton debut at Manchester United.

Saints boss Ronald Koeman was delighted to see his £4million signing score the goal that earned them just their second win at Old Trafford since 1988.

The Southampton boss said: "I mentioned to Charlie when he came on the pitch for a free-kick, go to the box and make a good header.

"That is the reason we wanted to sign Charlie Austin, a great numbers of goals."

Koeman, who has had a long-running feud with Louis van Gaal since they fell out at Ajax, said he expected United to put on an edgy display.

"We knew they are under pressure if you keep the organisation in your team, they will be nervous," said Koeman, who went on to describe reports in Holland that he had asked Guus Hiddink to put in a good word for him about the Chelsea job as "bull***t".