Che Adam's superb strike was the difference as Southampton held on against Watford at Vicarage Road for their first away league win of the season.
Scotland forward Adams latched on to an Adam Armstrong pass before turning on the edge of the box and curling the ball into the top corner in the 20th minute.
Watford came close to an equaliser midway through the first half when Saints defender Kyle Walker-Peters cleared Ismaila Sarr's effort off the line.
And in the closing stages Southampton keeper Alex McCarthy saved brilliantly, diving to his right to keep out Ashley Fletcher.
But the Saints ran out winners, recording just their second Premier League victory of the season and moving above their hosts in the table.
Afterwards, Saints manager Ralph Hasenhuttl said: "We could have scored more today. We had massive chances. It should be 3-0 or 4-0 at half-time. When it is just one it is a chance for the opponent. The rest of the performance was good but we need to be more clinical. One good save from Alex [McCarthy]. It was a deserved win.
"I cannot remember a lot of times when we are sitting calm at the end of games. That is what it is like being a manager at this club. We have been close to winning away but today it was a good performance. We had massive situations to get more out of it but in the end defence, apart from one tor two situations, was very stable. We had fresh players out there which is a positive.
"It was beautiful goal [from Che Adams]. He had one chance earlier that was easier to score than miss. He sometimes makes the easy things hard and the hard things easy.
"We have a young team and had a few new players. It takes time to adapt. The hard work we put in is now showing. It is right what we do. Every weekend is tough but we knew we had decisive weeks coming up where we have to take points. We have two wins in three games and a good performance."
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