A fabulous long-range effort from Perraud is the difference in the break, after an entertaining and competitive 45 minutes.
45 mins: Two minutes added on.
43 mins: Rice spearheads a fresh Hammers break, winning the ball in the centre of the park and a mazy run down the left channel leads to a ball into Antonio.
The striker just doesn’t quite know where to go with it and a tame shot balloons up for Caballero.
41 mins: Armstrong again finds himself in a good position after a lovely through ball from Djenepo, only for Rice to rush back and win the ball in his box.
West Ham fall flat down the other end with Antonio offside.
38 mins: Any danger of Southampton being most vulnerable after scoring is dissipating fast.
West Ham are struggling to bring the ball out of their half, as the clock ticks down on the first 45 minutes.
36 mins: Johnson says ‘what you can do I can do better’, with a long-range slash from the West Ham full-back firing wide at the near-post.
Here’s what he was trying to do…
33 mins: West Ham with the inevitable reaction to that goal as Southampton fans take a moment to collect their thoughts, following a memorable opener.
Dawson steps out to deal with Djenepo before the Hammers settle into some much-needed time on the ball.
Jack Rosser at St Mary’s
West Ham have been defending well but you don’t stop those. After failing to capitalise on two mix-ups at the back from Southampton the Hammers fall behind to a stunning strike from the French full-back Perraud, who was in acres on the left.
29 mins: Mad scrambles aplenty in the home box…
Diallo gives the ball away not once but twice with West Ham unable to fire off a convincing effort amid some last-ditch defending from Southampton.