Arsenal star William Saliba says there is a player at Liverpool who is ‘the boss’ and is ‘in charge of everything’. The Frenchman has developed into one of the best defenders in the world over the last two seasons. He is arguably Arsenal‘s most important player. Saliba, however, is still only 23 and there is room for improvement. He has now shared the one thing he is getting better at under Mikel Arteta. William Saliba says there’s one similarity between him and Virgil van DijkVirgil van Dijk has arguably been the best defender in the world since he joined Liverpool. The Dutchman has everythin…