A left winger Arsenal should at least have a look at is Oussama Idrissi of AZ Alkmaar in the Eredivisie:

In 42 apps in all competitions, he managed 27 G/A (17G, 10A) whilst playing 3,366 minutes this season. This meant that on average, he contributed to a goal every 125 mins.

For his career, he has 105 G/A in 227 appearances at only age 24, whilst accumulating 16,324 minutes; which gives him a career average G/A of 1 every 155 mins.

He's played at LW for the majority of his career thus far, but also provides an option to play him as a CF, RW or LM

Here are his league stats in comparison to the PL's top LWs. His 16 league goal contributions puts him 2 ahead of Pulisic, just 8 behind Rashford and 5 behind Son; which is pretty good given he's played 675 mins less than Rashford and 507 mins less than Son.

Despite only racking up 3 league assists, he averages more passes p/game and key passes p/game than any of the PL players in comparison. He is also adventurous with his distribution, playing 3.6 long balls a game which hasn't taken a toll on his passing accuracy of 83%.

He also loves to go forward in attack; out of the 4 players, Idrissi is the best dribbler with 5 attempts and 3.4 successful dribbles p/game, beating the next best of Pulisic's 2.2 per game. His drive also looks more impressive given that he's dispossessed only 1.4 times p/game.

Given that there's not much depth in the LW spot, there could be a potential starting spot for Idrissi, especially should Lacazette choose to leave which would give Auba the chance to play centrally.

Also, he would give Saka, Martinell and Willian competition to start at LW.