Arsene Wenger puts his Arsenal side through their paces as they prepare for crunch clash against Chelsea

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Arsenal are gearing up for their sternest test of the campaign so far when they travel to Stamford Bridge to face Chelsea on Sunday.

Arsene Wenger's side have come out on top in the last two outings between the clubs — the FA Cup final and the Community Shield last month — but knows this will be a different encounter altogether.

Chelsea have hit a rich vein of form, returning to the Premier League this weekend following a 6-0 drubbing of Champions League newcomers Qarabag on Tuesday.

Arsene Wenger was out on the training ground as his Arsenal side prepare for Chelsea

The Gunners were going through their final preparations before their sternest test thus far

Mohamed Elneny slides the ball past Alex Iwobi as the Gunners go through their El Rondo drill

Defender Per Mertersacker attempts to close down Theo Walcott but the winger pops it off

Aaron Ramsey shares a laugh with Gunners forward Danny Welbeck during training

But to counteract Chelsea's firepower, Wenger will need his record signing to shine after a solid start to life in North London.

Alexandre Lacazette has scored twice in his first five outings and will be looking to improve that this weekend after revealing he has finally settled into his new surroundings.

'It's good, although the weather is rather strange,' he told Arsenal Player. 'I'll have to get used to going from sunshine to cold rain in a matter of seconds! I'm enjoying myself at the club. 

'Everything is going well with my team-mates, the coaching staff and the medical team. I'm really happy. 

Wenger will hope his record signing Alexandre Lacazette is firing up top this weekend

The Frenchman has revealed he is feeling happy and settled since his move to North London

Alexis Sanchez eyes up a volley as he tries to get his shooting boots on ahead of Chelsea clash

Wenger made sure his side were in top shape as he envisages a lot of running this weekend

Midfielders Granit Xhaka and Jack Wilshere hone their dribbling at London Colney

'In the dressing room there are plenty of Frenchmen who've been helping me. The English players are very nice to me. All my team-mates in the squad are friendly. I have a natural connection with my French team-mates, but I am learning every day from everyone. It's going well and I hope it will carry on like that all season long. 

'Obviously a couple of months isn't long enough to get to know my team-mates really well,' Lacazette added. 'I'll be happy when I have that understanding with them on the pitch with my eyes shut. 

'It has been going well already, as I've managed to score some goals and boost my confidence. It's going well.'

Wenger watches on from the sideline as he mulls over his starting XI for the Chelsea clash

Welbeck unleashes a side-footed strike during a shooting drill at Arsenal's training base

Hector Bellerin leads the line as the players get in top shape ahead of Sunday's fixture

Defenders Sead Kolasinac, Nacho Monreal and Bellerin stretch during the warm down