Hello and welcome to our LIVE text and social media commentary as Southampton welcome Arsenal to St Mary’s for this 4th Round FA Cup clash. Team news to follow shortly.

FULL TIME: Southampton 0 Arsenal 5

Time almost up at St Mary’s as Gibbs is flagged offside. Not a great day at the office for the League Cup finalists…

There will be two minutes of additional time. Relief for Southampton!

SAVE! Now Perez is clean through on goal but Lewis makes himself big and makes a good save to prevent a sixth.

The Southampton fans are flooding out. Very disappointing performance but perhaps not entirely unexpected with the team Puel fielded.

Plenty of time for Walcott to record his 100th Arsenal goal! Probably around six minutes remaining...

GOAL ARSENAL! Another beautiful move if finished off by Theo Walcott, running onto Sanchez’s cut back and complete his hat-trick. It’s been a rout!

Arsenal have progressed from 16 of their 20 FA Cup fourth round ties under Arsene Wenger, losing only to Leeds (1996/97), Leicester (1999/2000), Bolton (2005/06) and Stoke (2009/10).

Ten minutes remaining and already safe to say that Arsenal are in the hat for the 5th round. Southampton won’t want it to become any more embarrassing than it already is. Sanchez with a rare mis-control and it’s out for a goal kick.

Danny Welbeck celebrates his brace.

Hojbjerg feeds Tadic in the box but there are four arsenal men around him to win back the ball. Arsenal good in all facets at the moment.

Southampton force a rare corner. It falls to Clasie but his shot is blocked by Gibbs and Arsenal clear.

Clasie goes for a spectacular volley but finds row z as Reine-Adelaide comes off for Alex Iwobi.