Arsenal made it two Europa League wins out of two on a goal-filled night in Belarus.

The Gunners raced into a three goal lead inside the first 30 minutes after Theo Walcott scored twice and Rob Holding found the net.

BATE Borisov pulled one back before the break only for Olivier Giroud to add Arsenal's fourth - and his 100th for the club - from the spot.

The hosts ensured a nervy finale after some poor defending but Arsenal's much-changed side saw it out for the victory.

Here are five key talking points.

1. All change but system remains

Arsenal team photo (
Image:
REUTERS)

As expected, Arsene Wenger made nine changes for the trip to Belarus.

Shkodran Mustafi and Mohamed Elneny were the only players to keep their place from the win over West Brom.

But while the line-up had a new look to it, the system did not.

Arsenal manager Arsene Wenger (
Image:
Action Images via Reuters)

Wenger found success with the 3-4-2-1 system towards the back end of last season and is determined to keep faith with it.

Ensuring every line-up he picks starts in the same shape will surely only be a positive thing for the Gunners boss.

2. Touch of class from Wilshere

Jack Wilshere celebrates (
Image:
Action Images via Reuters)

It may have only been BATE Borisov but this was a display that reminded us of just how good Jack Wilshere can be.

The Arsenal midfielder started in a No.10 role behind Olivier Giroud and Theo Walcott and was at the heart of their best attacking play from the off.

Wilshere played a key role in Walcott's opener, driving at the BATE defence before crossing for his teammate to finish.

Arsenal's Jack Wilshere in action (
Image:
Action Images via Reuters)

He then nearly teed up a third for Maitland-Niles with an exquisite through ball.

Wilshere's biggest problem is the competition for places within the Arsenal squad and the best he can hope for is a spot on the bench again at the weekend.

Injuries may be his best hope of a run in the first-team but displays like this will do his chances no harm.

3. What next for Walcott?

Arsenal's Theo Walcott celebrates (
Image:
Action Images via Reuters)

Will Theo Walcott have to leave Arsenal for regular action?

He scored in the Carabao Cup against Doncaster last week and continued where he left off with a brace here.

His opener came after excellent ball from Wilshere before capitalising on some horrific goalkeeping for his second.

Walcott scores the opener (
Image:
REUTERS)
Olivier Giroud celebrates with Theo Walcott (
Image:
REUTERS)

But like Wilshere, the Arsenal forward's best chance of first-team action is in cup competitions having played just 28 minutes in the Premier League so far.

Should the situation not change by the new year, Walcott simply must consider his options - and he won't be short of potential suitors on this evidence.

Getting out of his comfort zone in north London may be the only step to save his stuttering career.

4. The kids are alright

Arsenal's Reiss Nelson in action (
Image:
REUTERS)

Wenger revealed in his pre-match press conference that he would name an experienced side, with a couple of young faces.

Reiss Nelson and Joe Willock were both handed starts while Ainsley Maitland-Niles also got the nod.

Nelson was the most impressive of the trio with some penetrating runs down the right.

Arsenal fans will hope to see more of him as the season goes on and if he continues like this, there will be plenty more opportunities.

5. Ton up for Giroud

Arsenal's Olivier Giroud (
Image:
Action Images via Reuters)

When Arsenal were awarded a second-half penalty, all eyes were on who would take it.

Would Walcott try to get his hat-trick? Or would Olivier Giroud step up for his 100th Arsenal goal?

Fortunately we managed to avoid a Neymar vs Cavani repeat as the latter got the nod.

Giroud has been an incredible servant to this club but it remains to be seen how many more he will get.

He was close to joining Everton in the summer and they are expected to revisit the situation in January.

Can the Frenchman really be happy with a bit-part role and the odd cup appearance in a World Cup year?