Virgil van Dijk has, for a long time, been considered the best centre-back in English football. Van Dijk has been absolutely imperious for Liverpool over the past seven years or so, and he’s been perhaps the best centre-back on the planet in this time. However, recently, there’s been a new challenger emerging for Van Dijk’s crown. Arsenal’s William Saliba has been utterly brilliant for the Gunners over the past two-and-a-half seasons, and there have been suggestions that Saliba is even better than Van Dijk. Speaking on Rio Ferdinand’s Podcast, Van Dijk has now been discussing Saliba, and he’s …