Right that's it as the ref blows for full-time. A masterclass from Manchester City and misery for Bournemouth.

Follow reaction to the game and the rest of Saturday's action by clicking here.

Jason Roberts
Former West Brom striker on Final Score

It's not a headbutt as much as he brushed his head. But you still can't do that and you might as well start walking off the pitch.

Three minutes of added time for Bournemouth to endure before their misery is ended.

Liz Tray: That's the first poor decision Nolito's made. Incredibly stupid, and to appear baffled at the red? Grow up. You're nearly 30!

John Hartson
Ex-Wales striker on BBC Radio 5 live

Nolito puts his head into Smith's shoulder but I think that is really, really soft.

Come on ref, there is two minutes to go.

Image source, Reuters

Silly from Nolito. He aims a head-butt at Adam Smith, without appearing to make contact, and is given a straight red. There was no need with City so dominant. Smith gets a yellow. 

Bournemouth go close to a consolation goal as Harry Arter fizzes a shot just wide.

John Hartson
Ex-Wales striker on BBC Radio 5 live

Sterling just looks a different player. 

It is amazing what an arm around you can do.

Joe Kane: Didn't disagree with much Mourinho did but he got it so wrong with De Bruyne

Bunmi Aweda: The EPL suddenly became too easy for Guardiola, he doesn't even need a pep for Man City to hit cruise control

Mwiroreri: Guardiola has turned Sterling to Messi

Image source, Reuters

Manchester City midfielder Kevin de Bruyne exits stage left to a standing ovation as Aleix Garcia, 19, comes on for his Premier League debut.

Image source, Opta

Kevin de Bruyne has been involved in all four of Manchester City's goals today.

As his touch map would suggest, he's given free rein by the Premier League leaders to cause complete havoc.

Martin Keown
Former England defender on Final Score

Jack Wilshere, who came off for Dan Gosling, has spent the afternoon running after the ball which isn't his strength. It's been a torrid afternoon.

Simon Stone
BBC Sport at Etihad Stadium

Remember what I said about Raheem Sterling at half-time?

He is now being serenaded - ironically - with 'What a waste of money' by the City support, plus 'Raheem Sterling, he's top of the league'.

There is a standing ovation waiting for him if Pep Guardiola decides on an early substitution.

In contrast, Jack Wilshere has just gone off. Not had the greatest day.

John Hartson
Ex-Wales striker on BBC Radio 5 live

It is an absolute romp.

Who is playing better than De Bruyne right now? Bale, Ronaldo, Messi, Suarez?

De Bruyne has got to be right up there? 

Raheem Sterling dispossesses Charlie Daniels on the right flank, goes past a host of defenders as he runs across the Bournemouth box but his shot comes off the post.

Bournemouth lost 5-1 here last season and the only difference this time could be that they won't get the one. 

John Hartson
Ex-Wales striker on BBC Radio 5 live

This is like watching Barcelona against Celtic in midweek.

That is no criticism of Bournemouth. Man City are just far superior in every area of the pitch.

If Bournemouth don't sure up this could get embarrassing.

Barca thrashed Celtic 7-0 in midweek for those of you who missed it.

Image source, Reuters

Man City boss Pep Guardiola brings on John Stones for Nicolas Otamendi. Has that just made City stronger? Plus, with the hosts so comfortable, how long before we see the return to action of Vincent Kompany?

John Hartson
Ex-Wales striker on BBC Radio 5 live

3-0 City and game over.