Sterling on the bench for Man City
Mendy makes first start of the season
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Ben Raisbeck: ‘Grab an early goal in the second half and we’re right back in this one boys’
Nick Martin: Right lads, who's seen Escape to Victory.
Ademola Olabode: Let's walk off the pitch it'll only be a 3-0 loss.
Nice work gang. Send us your half-time team talk for Watford.
Man City 5-0 Watford
Gerard Deulolfeu - who nearly made this game 1-1 remember - is causing a bit of a scene on the edge of the box and a desperate tackle on him breaks to Roberto Pereyra. The substitute clips the ball past Ederson and has an empty net but he's crowded out and can only win a corner.
Man City 5-0 Watford
We have had 17 minutes of timid stuff since that last goal and it would appear Watford have blocked a dam that was leaking everywhere.
Bernardo Silva with 100% pass completion so far, Rodrigo with 97%. Fernandinho with 95% and he's seen more ball than any player out there.
This could turn into a testimonial in the second period if City ease up. I hope not. Too many teams do that these days. Go big or go home.
Image source, Getty Images#bbcfootball
Right then, we need your help quickly.
What would you say to the Watford players at half-time if you were manager?
Send the ideas (keep them clean) to #bbcfootball.
Man City 5-0 Watford
Nine touches for Dimitri Foulquier in 32 minutes of his Premier League debut. Roberto Pereyra brought on to change the game.
Image source, .Man City 5-0 Watford
Simon Stone
BBC Sport at the Etihad Stadium
I doubt Dimitri Foulquier is enjoying his Premier League debut very much.
Cracking from Stoney. Just as Foulquier is subbed on 32 minutes.
Man City 5-0 Watford
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Man City 5-0 Watford
All credit to Mancheter City but Watford are currently defending across two pitches it seems. Their back four is partly at the Etihad and the rest of it is maybe at Stockport County's ground or somewhere.
Sergio Aguero looks like he can again run through the heart of the defence but thankfully a big bounce forces him to stop and find a team-mate. David Silva benefits but his shot from 20 yards is blocked.
Image source, ReutersMan City 5-0 Watford
Simon Stone
BBC Sport at the Etihad Stadium
I have just done a bit of checking through the history books.
The biggest Premier League win remains Manchester United's 9-0 triumph over Ipswich in March 1995.
But there have been quite a few other big wins too, 14 of them by seven goals or more.
In none of those 14 games had a team been five goals ahead at half-time.
Man City 5-0 Watford
It could be six, Sergio Aguero is sent through one-on-one and he wants to lift it over Ben Foster.... just wide.
Moments later a blistering counter and it's Aguero again, first-time from a cut back... hits the post.
This is getting out of hand.
Image source, ReutersMan City 5-0 Watford
Right, so you're just tuning in. As one of my colleagues says, Norwich seem to have poked Manchester City with a stick last week and the retaliation is pretty epic.
We've had a David Silva tap in from a brilliant Kevin de Bruyne cross, a Sergio Aguero penalty after Riyad Mahrez was felled. Then Mahrez whacked a free-kick in via a deflection, before Bernardo Silva and Nicolas Otamandi both netted from close range.
That's all really. More as we get it. I doubt it will take long.
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Man City 5-0 Watford
It's all good, Watford came back from two down last week. They have a comeback in them...
Man City 5-0 Watford
Image source, Getty ImagesLive scenes from the away end at the Etihad. (Jokes)
Nicolas Otamendi
We are now on course for around 28-0 or so.
Even defenders are scoring. End it. End it now.
City are really missing Raheem Sterling here.
Sergio Aguero is slid in down the left side of the area and he flashes a low ball across goal - the type of ball he normally gets on the end of - for Nicolas Otamendi to convert from a few yards.
My head hurts.
Image source, ReutersBernardo Silva
The little man stoops on the six-yard box to nod home unchallenged. Pass me the abacus will you.
A corner kick - which comes after City again slice the visitors open - is flicked on at the near stick and Bernardo Silva has his own plot of land in the area to watch it bounce, crouch and nod home.
At this rate it'll be 24-0.
Image source, ReutersMan City 3-0 Watford
Simon Stone
BBC Sport at the Etihad Stadium
If you go back to the FA Cup final, Watford have now conceded seven goals in 43 minutes against Manchester City.
That is a quite incredible statistic.
Quique Sanchez Flores had a really long chat with Pep Guardiola before kick-off. I wouldn't be at all surprised if he was telling him if he had known the two were playing so soon, he would have waited before accepting the job.
Riyad Mahrez
Manchester City can declare inside of 15 minutes.
After his fine work to fashion space, Riyad Mahrez takes the free kick left footed and his deflects off the face of Tom Cleverley to bamboozle Ben Foster.
This is a sky-blue riot.
Image source, ReutersMan City 2-0 Watford
Riyad Mahrez has started brightly and with a few dips of the shoulder he's attacking the centre of the area but gets hacked down by Abdoulaye Doucoure right on the edge of the box.
This looks a deadly area...
Man City 2-0 Watford
Sergio Aguero now has eight goals in six games. The little magic man has scored in every game he has played this season. This football lark is easy.