Dave Brown: I love it when football fans boo someone for daring to be elbowed in the side of the head.

Barry Blunt: Kai Havertz should have been sent off.

RP_Specs: Havertz should be off. Clear swing of the arm knew his man was there.

Arjun Singh: This ref is unbelievable. You’re going to book Havertz for that? And not give any to Almiron for kicking Ziyech in the shin? The double standards are abominable.

Image source, Getty Images

Image source, Getty Images

Image source, Getty Images

A late goal from the Saints has halved Watford's lead, who have had some big chances. But they still lead at the break.

Antonio Rudiger heads away Matt Targett's free kick but Miguel Almiron hits a stunning volley that is thumped away by Edouard Mendy.

That's the last action of the half.

Leeds in control at the break.

Vitalii Mykolenko does really well to stand off Daniel Podence and wins a free-kick just outside his box.

Few minutes of added time to come following all the stoppages for Hwang Hee-Chan.

Manuel Lanzini catches Douglas Luiz in the face with a high boot and is booked. It looks painful and Luiz is down needing some treatment right before half time.

Leeds have had six shots, just one more than Norwich. The gulf though in the quality of those attempts is stark, with the home side forcing saves, rattling the woodwork and generally going close.

Patrick Bamford - making his first start since September - is a bit peripheral though, with just 12 touches so far. That's a low for any player on the pitch.

Match sharpness is a thing my friends!

HUGE chance for Patrick Bamford!

He's one-on-one with the keeper, looks to have stayed onside but he places it wide of the left post.

Ollie Watkins is hurt after a clash with Lukasz Fabianski as they both challenged for the ball.

A minute to go until half time and it has been a pretty forgettable first half really.

Romain Perraud cuts in from the right for Southampton and fizzes a dangerous shot over the bar on the half-volley.

Stephen Warnock
Former England defender on BBC Radio 5 Live at Stamford Bridge

Kai Havertz has his eyes on the ball, there’s no malice in it whatsoever. He’s gone up and used his arms as leverage to get up, we see it all the time.

I think a yellow card is the right decision, it’s not a red card at all.

His eyes are solely on the ball, there's nothing in it except for two players competing for the ball.

Ooooh why not?

Raul Jimenez goes for an audacious overhead kick but it's over the bar.

Watford are looking good going forward. Moussa Sissoko slides in Juraj Kucka but he's denied from close range.

Brandon Williams brings down Daniel James and there's huge appeals from Leeds. Nothing given.

Roy Hodgson has been there, seen it and bought the T-shirt. Watford are struggling to avoid an instant return to the Championship, but you wouldn't put it past Hodgson guiding them out of trouble, would you?

Image source, Reuters

Raul Jimenez squeezes through a few challenges in the box and the ball pops up for him. He hits it on the volley, forces a save from Jordan Pickford at the near post but it's pulled back for a foul from Jimenez.

Kai Havertz is booked as he catches Dan Burn with his elbow as he jumps for the ball. Burn needs a bit of treatment but eventually he is up and OK to continue.

Daniel James cuts inside in the box after being slipped in by Mateusz Klich but he should have gone with his right foot because he runs into traffic and loses it.

Jordan Pickford and Daniel Podence are having another little scuff in the box in the build-up to a Wolves corner. It's all been quite silly.