Arsenal star William Saliba is developing into one of the best centre-backs in the world, and he is helping his team thrive. The Frenchman has been a key figure since he became a starter two years ago, and he is now one of Arsenal’s most important players. Real Madrid are reportedly interested in Saliba for a future move, with the 23-year-old potentially set to become a generation-leading defender, but he cannot take all the credit for Arsenal’s incredible defensive record. Arsenal have conceded just one goal in five games this season, and whilst Saliba has been fundamental to this, his defens…