earned an important win in a pulsating London derby against to keep themselves in the race for the top four.

The victory moves the Gunners to within three points of fourth-placed and back above , who had gone fifth by beating Brighton.

put ahead in the 14th minute when he made the most of a poor Hector Bellerin cross with a fine first touch before turning and beating goalkeeper Kepa Arrizabalaga at his near post with a fierce strike.

’s intense pressing hampered ’s ability to play the ball from the back, particularly in the first half, and the Gunners deservedly added a second through captain Laurent Koscielny in the 39th minute.

failed to mark well enough at another set-piece and Koscielny missed a free header but the ball fortuitously looped in off his shoulder.

’s struggled to create in the first half but did hit the post on the stroke of half-time through Marcos Alonso’s header at a corner.

They posed greater threat in the second half but failed to have a shot on target until the 82nd minute as ’s defence, led by the excellent Koscielny, held firm.

show there is life in Emery’s debut season

Laurent Koscielny

and both appointed new managers in the summer and both came into the game at the Emirates with questions marks over their progress after difficult recent results.

had lost four of their last eight games, having been unbeaten in their previous 22, while had only won four of their last seven games.

Defeat to the Blues would have seen a seven-point gap open between the Gunners and the top four but their intensity and work-rate in the early stages put their opponents on the back foot from the outset.

seemed to have been set up with a clear plan by manager Unai Emery to press high up the pitch to prevent playing from the back.

Their intensity was made clear on two occasions in the first half when striker Pierre-Emerick Aubameyang twice ran back into his own half to make challenges.

should have scored as early as the fourth minute when Bellerin played in Lacazette who then crossed for Aubameyang, but the Gabon international failed to make contact with his finish from inside the area.

Both of ’s goals came from set-pieces, another area that looked to have been worked on pre-match, and Koscielny could have scored earlier than he did but put a free header straight at Arrizabalaga at another.

Aaron Ramsey is set to leave on a free transfer in the summer but started as the most attacking player in ’s midfield and he played a key role both going forward and leading the north Londoners’ press.

He constantly hassled ’s Jorginho – a key player in the Blues’ creativity – and no player had covered more ground than the Welshman when he was substituted in the 67th minute.

’s need for a central striker laid bare

For the problems are familiar ones which have been apparent in the Blues’ matches in recent weeks.

Sarri’s side scored 27 times in their opening 11 league matches this season but have netted just 13 times in their subsequent 13 outings.

Eden Hazard was again played in a false nine role but dropped deeper and deeper in search of the ball before eventually Olivier Giroud was introduced as a central striker in the 68th minute and the Belgian was able to play from a wider position.

had 64% possession but failed to create any clear opportunities from open play with their passing and build-up too slow. Their one shot on target came from Alonso from a tight angle on the left-side of the box and was easily parried away from Bernd Leno.

The Blues often worked the ball into wide areas 30 yards from goal but they had too few players in the box and were crowded out by ’s impressive defence.

Koscielny repeatedly cut out crosses and both he and fellow centre-back Sokratis Papastathopoulos, who had one of his best games since joining last summer, headed away any high balls.

have been heavily linked with a move for Juventus striker Gonzalo Higuain, currently on loan at Juventus, who Sarri worked with at his former club and on this evidence some increased attacking potency is clearly needed.

Man of the match – Laurent Koscielny ()

Laurent Koscielny

Opposing derby fortunes – the best stats

  • have won consecutive home games against in all competitions for the first time since February 2004.
  • have only won one of their last seven away London derbies in the (D2 L4), winning 1-0 at in December.
  • are unbeaten in 13 London derby matches at home (W10 D3), winning the last six in a row.
  • have won more points in seven games against ‘big six’ sides this season (8) than they did in the whole of the 2017-18 campaign (6).
  • ’s first shot on target didn’t come until the 82nd minute, from Marcos Alonso.
  • 63% of striker ’s goals this season have come in London derbies (5/8).
  • Only team-mate Pierre-Emerick Aubameyang (6) has scored more London derby goals this season than Lacazette.
  • Laurent Koscielny became the first defender to score 20 goals. The Frenchman has scored in each of his nine campaigns in the competition – only Dennis Bergkamp (11), Aaron Ramsey and Theo Walcott (10 each) have scored in more for the Gunners.

What’s next?

’s next fixture is in the FA Cup fourth round against at home on 25 January (19:55 GMT) live on BBC One. The Gunners’ next league game is at the Emirates against Cardiff on Tuesday, 29 January (19:45 GMT).

have their Carabao Cup semi-final second leg against on Tuesday (19:45 GMT) as they look to overturn a 1-0 first-leg deficit. They then play Sheffield Wednesday in the FA Cup on 27 January before returning to league action on 30 January with a trip to Bournemouth.

Line-ups

  • 19Leno
  • 2BellerínSubstituted forElnenyat 72′minutes
  • 5Papastathopoulos
  • 6Koscielny
  • 31Kolasinac
  • 34Xhaka
  • 11Torreira
  • 29Guendouzi
  • 8RamseySubstituted forMaitland-Nilesat 67′minutes
  • 14Aubameyang
  • 9LacazetteSubstituted forIwobiat 68′minutes

Substitutes

  • 1Cech
  • 4Elneny
  • 10Özil
  • 15Maitland-Niles
  • 17Iwobi
  • 18Monreal
  • 20Mustafi

  • 1Arrizabalaga
  • 28Azpilicueta
  • 2Rüdiger
  • 30David LuizBooked at 37mins
  • 3Alonso
  • 7Kanté
  • 5Jorginho
  • 17KovacicSubstituted forBarkleyat 63′minutesBooked at 90mins
  • 11PedroSubstituted forHudson-Odoiat 80′minutes
  • 10E Hazard
  • 22WillianSubstituted forGiroudat 68′minutes

Substitutes

  • 8Barkley
  • 13Caballero
  • 18Giroud
  • 20Hudson-Odoi
  • 27Christensen
  • 33Emerson
  • 44Ampadu
Referee:
Anthony Taylor
Attendance:
59,979

Match Stats

Home TeamAway Team
Possession
Home36%
Away64%
Shots
Home13
Away13
Shots on Target
Home5
Away1
Corners
Home5
Away6
Fouls
Home13
Away15

Live Text

Callum Hudson-Odoi () wins a free kick on the right wing.

Foul by Pierre-Emerick Aubameyang ().

Booking

Ross Barkley () is shown the yellow card for a bad foul.

Foul by Ross Barkley ().

Matteo Guendouzi () wins a free kick in the defensive half.

Delay over. They are ready to continue.

Delay in match Granit Xhaka () because of an injury.

Foul by N’Golo Kanté ().

Granit Xhaka () wins a free kick in the defensive half.

N’Golo Kanté () wins a free kick in the defensive half.

Foul by Granit Xhaka ().

Callum Hudson-Odoi () wins a free kick on the right wing.

Foul by Matteo Guendouzi ().

Foul by Marcos Alonso ().

Granit Xhaka () wins a free kick in the defensive half.

Attempt missed. Mohamed Elneny () right footed shot from outside the box is high and wide to the right. Assisted by Alex Iwobi.

Delay over. They are ready to continue.

Attempt saved. Marcos Alonso () left footed shot from the left side of the box is saved in the bottom right corner. Assisted by Eden Hazard.

Ross Barkley () wins a free kick in the defensive half.

Foul by Matteo Guendouzi ().

Attempt missed. () left footed shot from the left side of the box misses to the right. Assisted by Mohamed Elneny.

Foul by Antonio Rüdiger ().

Alex Iwobi () wins a free kick on the left wing.

Substitution

Substitution, . Callum Hudson-Odoi replaces Pedro.

Foul by Marcos Alonso ().

Ainsley Maitland-Niles () wins a free kick in the defensive half.

Corner, . Conceded by Sokratis.

Corner, . Conceded by Ainsley Maitland-Niles.

Attempt missed. Eden Hazard () left footed shot from outside the box is high and wide to the left. Assisted by Antonio Rüdiger.

Eden Hazard () wins a free kick in the attacking half.

Foul by Granit Xhaka ().

Substitution

Substitution, . Mohamed Elneny replaces Héctor Bellerín because of an injury.

Delay over. They are ready to continue.

Delay in match Héctor Bellerín () because of an injury.

Substitution

Substitution, . Olivier Giroud replaces Willian.

Substitution

Substitution, . Ainsley Maitland-Niles replaces Aaron Ramsey.