Liverpool are now joint-top of the Premier League table after easing past Manchester United 3-0 at Old Trafford. Luis Diaz scored twice and Mohamed Salah added a third as Liverpool overcame their fierce rivals on their home soil. It was another first-class performance from Arne Slot and his players, who rightfully left Manchester with beaming smiles, with Diaz messaging Alexis Mac Allister after the win. Having beaten both Ipswich and Brentford 2-0, the Reds now boast seven goals from their first three games, with zero conceded. It has been a real team effort so far under Slot this season, and…