Southampton v Arsenal LIVE - Updates from St Mary's as Xhaka sweeps Gunners into early lead

... Southampton can counter, but Odegaard does well to sweep up the break.

Martinelli darts central as he shoots, and the deflection off Salisu allows Arsenal to have a corner.

Saka thinks he's fouled as Salisu manhandles him to the ground tight to the touchline.

Ward-Prowse is persistent down the left and wins another corner. This time Tomiyasu eases it away, and Saliba slices it out of play.

Aribo is in there at the near post, but the ball is called to have cannoned off an Arsenal head and there's another for Ward-Prowse to deliver, but White clears.

... once more, as Armstrong wins the set play off Partey.

... by Xhaka.

A decent Ward-Prowse delivery is sent behind by White.

Tomiyasu is taking quite a while here to tie his laces...

... and Arsenal are in cruise control. The hosts have hardly hurt them as of yet, and that is something Ralph Hassenhuttl will need to address quickly.

... for Saka, who is adjudged to have dived, looking for a free kick.

Partey has been the man quietly getting things done for Arsenal. He's breaking things up and recycling possession, while Xhaka is the all-action warrior, whose strike has put the Gunners a goal to the good.

Ward-Prowse gives it away to Partey, who feeds Odegaard, and the Norwegian gets his head up to slide Jesus in, but the Brazilian slices into the side netting.

The change in formation seems to have helped the hosts as they've seen more of the ball. They are, however, getting further and further away from Arsenal's goal mouth.

...as the Saints recycle possession.

The hosts break the Arsenal press as Perraud breaks down the left, and his cross is blocked by White for the game's first corner.

... for Southampton as Elyounoussi has moved back to right wing-back, and Lyanco is now tucked in as the right centre-back. Armstrong has moved into the engine room to create a 3-5-2, as was predicted pre-match.

... now for the Saints as they've acclimatised to the game's speed. Arsenal are still in the ascendancy; hunting in packs to win the ball back high.

Arsenal are really dictating the tempo so far, winning the ball back quickly as they look to build on their lead.

Saka is adjudged to have handled on halfway.

Arsenal are rampant as Saka pops up in a dangerous pocket of space behind Perraud, as Salisu slides in. The Saints are saved by the flag.