There’s no question that Virgil van Dijk is one of the reasons Liverpool currently find themselves top of the Premier League table. After a poor season last year, Van Dijk has been back to his best this time out. Now Liverpool captain, the 32-year-old has stepped up in all respects in the absence of Jordan Henderson and James Milner. But that doesn’t negate the fact that Virgil was at fault for one of the biggest moments of the season on Sunday. His mix up with Alisson Becker allowed Gabriel Martinelli to restore Arsenal’s lead at a time they weren’t looking particularly threatening. The Reds …