Manchester City

"If I get the chance close to the box, I try to be there and take the right decisions. I just try to do my best."

That's Ilkay Gundogan on his seven Premier League goals this season.

"We all try our best, it doesn't matter who is playing, it's like all the players get more and more ready to play," he adds.

"Obviously Kevin [De Bruyne] is a big miss for us but we need everyone to be involved."

Arsenal

Arsenal midfielder Bukayo Saka: "It was much better than Saturday. Saturday wad disappointing. We are the holders and we took it hard. We exploited their weaknesses and got the win we deserved.

"I said to him [Lacazette] about the opportunity, saying I would run in behind. We got a goal so I am happy. I am not just happy with Laca, though, I am happy with everyone.

"I am happy to be playing for Arsenal. I have the passion on the pitch and the boss gives me the freedom.

"Game after game, we take it. We have to do that. The Premier League is changing rapidly this season. You have to focus on each and try to win."

That win moves Arsenal up to eighth place in the table.

They are just five points off West Ham, who have played as many games in fourth.

Arsenal have come a long way from that "relegation battle..."

Image source, BBC Sport

Big Banana: Gritty performance by Arsenal. Southampton didn’t play badly. Not many teams will beat Southampton at St Mary’s. This renewed Arsenal side might be up to something.

Arsenal are sneaking up the table. Solid performance all round.

That's it.

Manchester City go top of the Premier League.

Pranav M: Lacazette’s workrate for Arsenal has been phenomenal today.

Aleksander Pagels: 4th time this season West Brom have concede five. 5th time they've conceded at least 4. 8th time they've conceded at least 3. Just saying.

Good feet from Joao Cancelo, decent hit too, but it's straight at Sam Johnstone from outside the box and that's easy for the Baggies keeper to gather.

Nicolas Pepe is off. I repeat, Nicolas Pepe is ACTUALLY off this time.

On comes Joe Willock. No second booking for Pepe as he steps off the far side of the pitch this time...

Alistair Bruce-Ball
BBC Radio 5 live commentator

I do think that after Southampton named their strongest team in the FA Cup last Saturday and went at it hammer and tongs against Arsenal, they have tired here in this game.

Plus the bench is not as deep as some of the big teams. This game has probably been a bridge too far for Southampton tonight.

Ederson has to scramble to his front post to turn the corner behind before Robson-Kanu can get his head to it. The Baggies go short with their next delivery and City can clear.

Nicolas Pepe races onto Mohamed Elneny's poke through the middle after he beats Caleb Watts to the ball in the middle.

Jan Bednarek is back to stop Pepe, who tries to cut inside then outside, but eventually chips it over the bar. Bednarek just held his ground.

Hal Robson-Kanu goes down in the box under the challenge of Aymeric Laporte, but looked like the Manchester City defender got the ball. West Brom get a corner.

West Brom have conceded 22 goals in their last five Premier League games on home soil, the most a team has shipped across five top-flight games since Aston Villa in December 1935 (22).

Gabriel Jesus pops it inside to Joao Cancelo, who lofts a high ball over the top in return looking for the Brazilian, but Jesus' touch is gathered by Sam Johnstone.

James Ward-Prowse has a free-kick just outside the box. He curls it towards the left post but Bernd Leno dives to get a strong hand on it.

Ibrahima Diallo can't poke in the rebound on the stretch.

Chris Judge: In such a close race, goal difference could be the deciding factor this season...at the top anyway!

Joe Wedgwood: Said to my mates last season that Saka was best young player in England and they laughed. Now the boy is absolutely tearing it up game after game!

Hal Robson-Kanu is a touch late on Ruben Dias and gets himself a yellow card.