Premier League round-up: West Ham, Saints and Brighton make it away wins all round in Premier League
Watford 1 West Ham 3
Brighton 0 Southampton 2
Sheffield United 1 Leicester City 2
Moussa Djenepo's stunning first Premier League goal set Southampton on course for their first points of the season as they won 2-0 at 10-man Brighton.
Substitute Djenepo, a £14million summer signing from Standard Liege, had only been on the pitch for 78 seconds when he cut in from the left to bury the ball into the top-right corner from the edge of the box.
Nathan Redmond tapped home a cross from Sofiane Boufal to seal the points in time added on.
Albion played a man light for an hour after Florin Andone was sent off for a reckless tackle on Yan Valery, while Lewis Dunk had a first-half header ruled out by VAR.
Elsewhere, West Ham's record signing Sebastien Haller scored a brace to secure a 3-1 win and condemn Watford to a third-successive Premier League defeat this season.
Captain Mark Noble converted from the penalty spot inside the opening minutes before Andre Gray hauled the hosts level with 17 minutes gone.
But Watford were made to pay for spurning a number of chances as Haller, the £45million summer arrival from Frankfurt, scored twice in nine second-half minutes to heap the pressure on manager Javi Gracia, whose side have now lost their last seven matches in all competitions.
Finally, Harvey Barnes' spectacular second-half thunderbolt clinched Leicester a 2-1 win at Sheffield United and their first victory of the season.
Barnes, who signed a new five-year deal with the Foxes in June, crashed home a brilliant winner six minutes after stepping off the bench.
It was tough on Chris Wilder's side, for whom substitute Oli McBurnie had headed a deserved equaliser after Jamie Vardy fired the Foxes ahead with his first goal of the campaign just before half-time.
The Blades gave another good account of themselves, roared on again by a partisan Bramall Lane crowd as they poured forward in search of a second equaliser.
But Leicester were the classier side and they held on for all three points after drawing their first two matches, while the Blades tasted defeat for the first time since winning promotion back to the Premier League.