West Ham plunged Southampton deep into relegation trouble as Marko Arnautovic haunted Mark Hughes in a 3-0 win on Saturday
In their first game since fans charged onto the pitch during their 3-0 defeat to Burnley, the Hammers surged to a comfortable lead at half-time with a double from Arnautovic (17, 45+4) and a powerful strike from Joao Mario (13)
Hughes, who was taking charge of his first Premier League game for Southampton, has history with Arnautovic after he publicly criticised him following West Ham's game with Stoke earlier this season
 The West Ham striker celebrated his opener by angrily shouting towards the away dugout, presumably with Hughes his target
The result sends West Ham five points clear of the drop zone while Southampton remain in the bottom three, two points from safety with Arsenal (a) and Chelsea (h) their next two games
West Ham skipper Mark Noble called for the home fans to stick with their team for this crucial encounter, which subsequently turned out to be an easy request as the Hammers started full of energy
They were 2-0 up inside 17 minutes as Southampton froze under the pressure
On 13 minutes, a quick counter-attack down the right flank - triggered by Cheickhou Kouyate - resulted in Mario firing home a spectacular strike from 18 yards out
The home fans sensed nervousness in the visitors and roared their team on
 Arnautovic fired a gilt-edged chance wide on 15 minutes but made amends 90 seconds later when hammering home a rebound after his initial header from close range was palmed back to him
Southampton's front pair of Charlie Austin and Manolo Gabbiadini were mere bystanders as the Hammers controlled the game in every department
 The third goal came during first-half injury-time when Arnautovic volleyed home a pin-point Arthur Masuaku cross
The introduction of Shane Long improved Hughes' men after the break but they never looked capable of giving Joe Hart anything serious to think about
Arnautovic hunted his first Premier League hat-trick but couldn't add to his tally despite testing McCarthy with some long-range efforts - his eighth and ninth goals in his last 13 games were more than enough for the comfortable Hammers
Having been sent off in two of his last three appearances against Southampton, Arnautovic had unfinished business with them and, of course, their manager Hughes, who sold him to West Ham
 The decision to switch him to a central striker now looks a masterstroke from Moyes and after failing to score in his first 13 appearances for West Ham, he's now got nine goals to his name this season
"We made a great start and we had great support from the first minute and I think it inspired the players as well
"The players had a really good go right at the start and thankfully we got a couple of early goals and the third goal just before half-time made a big difference as well
" "We were poor
 The opening period of a game is vitally important
"You have to understand as the away team that the home team is going to come flying out of the blocks and you have to be ready to go yourself
"Unfortunately, as happened against Newcastle, a very similar situation unfolded today
"West Ham have a London derby with Chelsea at Stamford Bridge next Sunday, live on , while Southampton take on Arsenal in Sunday's early game - also live on Sky Sports
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