Arsenal manager Mikel Arteta has put together a superb squad that has challenged for the Premier League title two years in a row. When Arteta took the Gunners reins in 2019, they were in mid-table and hadn’t even reached the top four for a couple of years. Now, Arsenal are back at the top of English football and will be eager to kick on in the coming seasons. One of the Gunners’ best players was signed before Arteta came in, but the Spaniard’s management of the player helped him reach the top. The player in question is William Saliba, who Arsenal signed in the summer of 2019 but didn’t make hi…